Achille C. Varzi

Complete Bibliography

  1. Books (Academic)
  2. Books (Other)
  3. Edited Volumes and Journal Issues
  4. Articles
  5. Encyclopedia Entries
  6. Book Reviews and Critical Notices
  7. Varia
  8. Newspaper Articles
  9. Translations

(See here and for downloadable material.)

1. Books (Academic)

  1. 2021, with Aaron J. Cotnoir: Mereology, Oxford, Oxford University Press, xvi + 405 pp. | ISBN 978–0–19–874900–4
    Paperback edition (with minor revisions): in press | ISBN 978-0-19-890893-7

    Abstract. Mereology—the formal theory of parthood relations—has become a chapter of central interest not only in metaphysics but also in logic, the foundations of mathematics, and the philosophy of science, which is to say in every field where part-whole theorizing plays a fundamental role. This book provides a critical survey and an up-to-date assessment of the main results in this area, with an eye to both their philosophical underpinnings and their formal properties. In doing so, it also aims to investigate the varieties of formal systems currently available, including different axiomatizations of so-called classical mereology, and to contribute to the development of new, non-classical theories of parthood (such as non-well-founded mereologies, non-extensional mereologies, and mereologies based on non-classical logics).

  2. 2015: I colori del bene [The Colors of the Good], Naples, Orthotes, 113 pp. | ISBN 978-88-97806-93-6

    Abstract. Are values intrinsic qualities of things or are they extrinsic, like colors, whose possession by material objects is relative to the experiences of an observer? Is there a good “in itself”—which alone determines the classification of our actions into right, neutral, or morally inacceptable—or is the opposition between rightness and wrongness in some sense subjective, cultural, external to the constitutive traits of the reality that surrounds us? This dilemma, whose origins trace back to Plato’s Euthyphro, has defined the major coordinates of moral philosophy throughout history. Here I offer a critical reconstruction of its import vis-à-vis the broader debate between metaphysical realism and antirealism and put forward my reasons for siding decisively with the second horn.

  3. 2014b, with Claudio Calosi: Le tribolazioni del filosofare. Comedia metaphysica ne la quale si tratta de li errori & de le pene de l’Infero [The Tribulations of Philosophye. A Metaphysicall Comedye wherein ’tis told of the Errours & the Paynes of Helle], Rome, Laterza, xxxix + 269 pp. | ISBN 978-88-581-1089-8
    e-book edition: 2014 | ISBN 978-88-581-1272-4

    Abstract. A scholarly annotated epic poem on the pitfalls and tribulations of “good philosophizing”. Divided into twenty-eight cantos (in medieval Italian hendecasyllabic terza rima), the poem tells of an allegorical journey through the downward spiral of the philosophers’ hell, where all sorts of thinkers are punished for their faults and mistakes, in the endeavor to reach a way out of the condition of intellectual impasse in which the narrator has found himself. The affinities with Dante’s Inferno are apparent. Whereas Dante’s poem is about human sins and moral felonies, this one is about philosophical errors and fallacies; whereas Virgil takes Dante through the gluttons, the wrathful, the violent, the traitors to parties and countries, etc., here Socrates takes us through the realists, the skeptics, the dualists, the nichilists, the worshipers of language and easy mythos, etc. And yet this is not just a philosophical counterpart of Dante’s masterpiece, even less a parody. We can’t say exactly when, how, and why it was written, but this is an authentic piece of philosophy, a poem of love, a passionate testimony of militant metaphysics. It is the inspired and inspiring journey of someone, anyone, who is truly moved by the Love for Wisdom and by the grueling purification of the intellect that it demands.

  4. 2014a, with Roberto Casati: L’incertezza elettorale [Electoral Uncertainty], Rome, Aracne, 79 pp. | ISBN 978-88-548-7928-7
    e-book edition: 2014 | ISBN 978-88-548-7928-7

    Abstract. “We may never know with complete certainty the identity of the winner of this year’s Presidential election.” The words with which Judge Stevens expressed his dissent from the US Supreme Court Sentence, which effectively decided the election of President George W. Bush in 2000, sanctions the role of uncertainty in our political life. It’s not just that in some cases it may be difficult to determine the winner of an election. As the participants in the dialogue of this book come to realize, reflecting on the events of those days, the uncertainty affects all aspects of our electoral practices, beginning with the most basic questions: What is a vote? How do we count votes? And do votes really count? (This book expands on material previously published in article form as [4:2008a].)

  5. 2010: Il mondo messo a fuoco. Storie di allucinazioni e miopie filosofiche [The World in Focus. Stories of Philosophical Hallucinations and Myopias], Rome, Laterza, 208 pp. | ISBN 978-88-420-9205-6
    e-book edition: 2011 | ISBN 978-88-581-0156-8

    Abstract. At the beginning, all there is is world. It’s not all alike: here is mama, there is cold, over there—noise. Soon we begin to distinguish and to recognize: more mama, more cold, more noise! Yet initially these things appear to be all of a type. Each is, in Quine’s words, just a history of sporadic encounter, a mere portion of all there is. Only with time does this fluid totality in which we are immersed begin to take shape: sensations recur; objects stick out; noise changes depending on the things around us. We learn how to act and to predict. We launch into giving names, using verbs, painting adjectives. Such marvelous unfolding is the subject of much inquiry by psychologists and biologists, and eventually by sociologists. But for a philosopher it is first and foremost the source of deep and bemusing bewilderment, if not a dilemma: Are we learning to make out the structure of the world, or are we endowing the world with a structure of our making? Is reality gradually revealing the mechanisms according to which it is organized, or is it we who progressively organize the amorphous and continuous flux of our experience?

  6. 2005: Ontologia [Ontology], Rome, Laterza, 178 pp. | ISBN 88-420-7623-6
    Reprinted: 2008.
    ~ e-book edition: 2011 | ISBN 978-88-581-0142-1
    On-line edition: Bari, SWIF, 2005 | ISSN 1126-4780
    French translation by Jean-Maurice Monnoyer: Ontologie, Paris, Ithaque, 2010, 192 pp. | ISBN 978-2-916120-11-9
    Reissued (with revisions): Rome, Laterza, 2019, 160 pp. | ISBN 978-88-5813-921-9
    ~ e-book edition: 2019 | ISBN 978-88-581-4016-1
    ~ Reprinted: 2022.

    Abstract. An introduction to analytic ontology. Part 1 deals with the question, What is ontology?, focusing on (i) the interplay between ontological and broadly metaphysical concerns, and (ii) the difference between material ontology and formal ontology. Part 2 deals with the question, How is ontology done?, focusing on (i) the delicate interplay between ontology and truth-making (or: between meaning and existence), and (ii) the differences between revolutionary vs. hermeneutic, prescriptive vs. descriptive, and absolute vs. relative approaches to ontology. Part 3 surveys the state of the art in a number of areas, both in material ontology (e.g., the problem of universals, the status of objects and events, the ontology of mathematics, of the physical sciences, of the social sciences) and in formal ontology (identity, ontological dependence, part-whole relations).

  7. 2001: Parole, oggetti, eventi e altri argomenti di metafisica [Words, Objects, Events, and Other Metaphysical Matters], Rome, Carocci, 239 pp. | ISBN 88-430-1989-9
    Reprinted 2002, 2006, 2009, 2012.

    Abstract. Consider the vase on the table and the lump of clay from out of which it is made. How many entities do we have in front of us—one or two? Could that very same vase be made out of another lump of clay, or have another shape? And what differentiates a material object such as a vase from entities of different sort, such as the actions of the potter or her intentions? Starting from classic puzzles such as these, this volume aims to offer an introductory treatment of the main topics in contemporary analytic metaphysics: the nature of things, their identity and persistence conditions, their relations of dependence—more generally, the preconditions for our ability to speak about the world at all.

  8. 1999b: An Essay in Universal Semantics, Dordrecht, Kluwer, ix + 145 pp. | ISBN 0-7923-5629-5
    Paperback edition: 1999 | ISBN 978-90-481-5186-8
    ~ e-book edition: 2010 | ISBN 978-94-015-9243-7

    Abstract. This book is a study in the foundations of model-theoretic semantics. The central thesis is that one does not need to assume a perfect structural fit between languages and their models in order to characterize the basic semantic notions. In particular, truth-value gaps and gluts can be explained away as local phenomena that do not bring logical disaster in their wake. The account is based on a generalization of supervaluationary techniques and is illustrated with reference to a range of different sorts of examples, from sentential logic to type theory.

  9. 1999a, with Roberto Casati: Parts and Places. The Structures of Spatial Representation, Cambridge (MA), MIT Press, x + 238 pp. | ISBN 0-26203-266-X
    e-book edition: 2000 | ISBN 0-58510-660-6
    Paperback edition: 2013 | ISBN 978-0-262-51707-2

    Abstract. Thinking about space is thinking about spatial things. The table is on the carpet; hence the carpet is under the table. The vase is in the box; hence the box is not in the vase. But what does it mean for an object to be somewhere? How are objects tied to the space they occupy? This book is concerned with these and other fundamental issues in the philosophy of spatial representation. Our starting point is an analysis of the interplay between mereology (the study of part/whole relations), topology (the study of spatial continuity and compactness), and the theory of spatial location proper. This leads to a unified framework for spatial representation understood quite broadly as a theory of the representation of spatial entities. The framework is then tested against some classical metaphysical questions such as: Are parts essential to their wholes? Is spatial colocation a sufficient criterion of identity? What (if anything) distinguishes material objects from events and other spatial entities? The concluding chapters deal with applications to topics as diverse as the logical analysis of movement and the semantics of maps.

  10. 1998, with John E. Nolt and Dennis A. Rohatyn: Theory and Problems of Logic, New York, McGraw-Hill, vii + 322 pp. | ISBN 0-07-046649-1
    e-book edition: 2000 | ISBN 978-0-07-136868-1
    Reissued: 2011 | ISBN 978-0-07-175546-7
    Italian translation by Francesca Boccuni et al.: Logica, Milan, McGraw-Hill Italia, 2003, vii + 316 pp. | ISBN 978-88-386-5073-4
    ~ Second Italian edition (fully revised and enlarged): Milan, McGraw-Hill Italia, 2007, xii + 343 pp. | ISBN 978-88-386-6376-9
    ~ Third Italian edition (further revised and enlarged): Milan, McGraw-Hill Italia, 2022, xii + 435 pp. | ISBN 978-88-386-5482-4
    Abridged edition: Logic, New York, McGraw-Hill, 2005, v + 150 pp. | ISBN 0-07-145535-3
    ~ Reissued (with revisions): 2011 | ISBN 0-07-177753-7

    Abstract. An introductory textbook in logic, covering the syntax and semantics of propositional logic (including proof techniques and refutation trees), the syntax and semantics of predicate logic (including proof techniques and refutation trees), inductive logic, the probability calculus, the analysis of fallacies, and further developments in formal logic including the theory of descriptions, higher-order logics, modal logic, and formal arithmetic. Features over 500 problems with complete solutions.

  11. 1994, with Roberto Casati: Holes and Other Superficialities, Cambridge (MA), MIT Press, x + 253 pp. | ISBN 0-262-03211-2
    Paperback edition (with minor revisions and an extended Index): 1995, x + 256 pp. | ISBN 0-262-53133-X
    ~ e-book edition: 1999 | ISBN 0-585-05399-5
    Italian translation by Libero Sosio (with a new Foreword): Buchi e altre superficialità, Milan, Garzanti, 1996, 333 pp. | ISBN 88-11-59279-8
    ~ Reissued: 2002 | ISBN 88-11-67516-2
    Chapter 3 reprinted as ‘Material Bodies’, in Steven D. Hales (ed.), Metaphysics: Contemporary Readings, Belmont, Wadsworth, 1999, pp. 428–435.

    Abstract. Holes are a good example of the sort of entity that down-to-earth philosophers would be inclined to expel from their ontological inventory. In this work we argue instead in favor of their existence and explore the consequences of this liberality—odd as they might appear. We examine the ontology of holes, their geometry, their part-whole relations, their identity and their causal role, the ways we perceive them. We distinguish three basic kinds of holes: blind hollows, perforating tunnels, and internal cavities, treating these uniformly as immaterial bodies. We develop a morphology of holes, focusing on the way a hole can be filled, and then look at the main properties of the resulting conceptual framework: holes are parasitic upon the surfaces of their hosts; holes can move, fuse into each other, split; they can be born, develop, and die. Finally, we examine how some morphological features of holes are represented in perception, including the conditions whereby we have the impression that we see, feel, or even hear a hole. The book has over 150 pictures and is completed by a formal appendix, a section with puzzles and exercises, and a extensive annotated bibliography.

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2. Books (Other)

  1. 2017b, with Roberto Casati: Semplicemente diaboliche. 100 nuove storie filosofiche [Simply Diabolic. 100 New Philosophical Stories], Rome, Laterza, 2017, vi + 224 pp. | ISBN 978-88-581-2018-7
    e-book edition: 2017 | ISBN 978-88-581-2864-0
    Chinese translation by Tao Huihui: 100个 最脑洞 的哲学故事, Guangzhou, Guangdong People’s Publishing House, 2019, 344 pp. | ISBN 97-872-1813-739-1
    Reissued: Rome, Laterza, 232 pp., 2020 | ISBN 978-88-858-14214-1
    ~ e-book edition: 2020 | ISBN 978-88-581-4301-8

    Abstract. A new collection of philosophical stories, dialogues, epistles, and imaginary documents illustrating the many philosophical conundrums that hide in the wrinkles of everyday life. A follow-up to [2:2004], based on articles published weekly in the Sunday cultural supplement of the Italian newspaper Il Sole 24 Ore.

  2. 2017a, with Armando Massarenti and Paolo Morelli, ed. by Filippo La Porta: Meravigliarsi come i bambini. Conversazione sulla filosofia [Wondering like Children. A Conversation on Philosophy], Roma, Castelvecchi, 2017, 48 pp. | ISBN 978-88-69446-42-9

    Abstract. An exchange on the meaning and purpose of doing philosophy in the world we live in.

  3. 2016, with Maurizio Ferraris: I modi dell’amicizia [The Modes of Friendship], Naples, Orthotes, 69 pp. | ISBN 978-88-93140-39-3

    Abstract. An extinguishing bonfire and a moon nearing sunset engage in a dialogue about friendship—its meaning, its forms, its ambivalence, its contradictions.

  4. 2006, with Roberto Casati: Il pianeta dove scomparivano le cose. Esercizi di immaginazione filosofica [The Planet Where Things Disappeared. Exercises in Philosophical Imagination], Turin, Einaudi, 155 pp. | ISBN 88-806-1807-1
    Chapter 11 reprinted in Cristina M. D’Argenio, Rossella Di Donato, and Anna M. Evangelista, A scuola nel bosco, 3 – Letture, Teramo, Lisciani, 2016, pp. 16–17 (reissued as A scuola insieme, 3 – Letture, Teramo, Lisciani, 2017).
    English edition: The Thinkies: A Young Reader’s Guide to Philosophy, Piermont (NH), Bunker Hill, 2016, 160 pp. | ISBN 978-15-9373-156-4.

    Abstract. This is a book of philosophy for children so they can think for themselves and grow with imagination and confidence. There’s Mrs. Boom and Mr. Beem who wonder why they can’t find things. There’s Mr. Bamm who wants to know whether green is green or some other color. There’s Tic and Tac who wonder who is to blame for the broken vase. The Thinkies live in a world filled with wonder and excitement, a world in which the questions are more important than the answers and things puzzle them all—including the purpose of hats and umbrellas, the nature of shadows, the length of infinity, the survival of things, and whether there is a place where squares are round or a time when time doesn’t flow and people doon’t grow old.

  5. 2004, with Roberto Casati: Semplicità insormontabili. 39 storie filosofiche, Rome, Laterza, 2004, 194 pp. | ISBN 88-420-7304-4
    Reissued: 2006,
    ~ Reissued (with a preface by Armando Massarenti): Milan, Il Sole 24 Ore Cultura, 2007, 202 pp. | ISBN 977-18-638-0379
    ~ e-book edition: 2011 | ISBN 978-88-581-0143-8
    ~ Reprinted: 2016 | ISBN 88-420-7965-1
    ~ Chapter 11 reprinted in Sophias, 1 (2008), 60–61.
    ~ Chapter 1 adapted into short film by Pierluca di Pasquale: Stanza 88, Rome, 2010 | IMDB 2338263 (Vimeo 26956067)
    French translation by Pierre-Emmanuel Dauzat: 39 Petites histoires philosophiques d’une redoutable simplicité, Paris, Albin Michel, 2005, 205 pp. | ISBN 2-226-15561-9
    ~ Reissued: 2008 | ISBN 978-2-253-08390-0
    Korean translation by Hyunkyung Lee: 논쟁의 대가들 · 역설과 위트 논리와 상상력의 39 가지 철학우화, Seoul, Yoldaerim, 2005, 264 pp. | ISBN 89-9098-911-6
    ~ e-book edition: 2005 | ISBN 105-81-99961
    Portuguese translation by Maurício Santana Dias: Simplicidades insolúveis. 39 histórias filosóficas, São Paulo, Companhia das Letras, 2005, 192 pp. | ISBN 85-35907-49-1
    ~ Chapter 1 adapted into radio play by Lucas Pinton dos Santos et al.: Quarto 88, Caxias do Sul, 2011 (Finalist at the XVIII Prêmio Expocom 2011).
    ~ Chapter 7 adapted into radio play by Bruno Di Giaimo Rosas et al.: Transplante de pessoa, Caxias do Sul, 2010 (Winner of the XVII Prêmio Expocom 2010).
    English edition: Insurmountable Simplicities. Thirthy-nine Philosophical Conundrums, New York, Columbia University Press, 2006, 144 pp. | ISBN 978-0-231-13722-5
    ~ Paperback edition: 2008 | ISBN 978-0-231-13723-2
    ~ Chapters 1, 3, 5, 26, 36, and 38 adapted into stage play by Natalie Glick: Insurmountable Simplicities, All Gone Theatre Company, New York, 2010.
    Greek translation by Leonidas Balasopoulos: Ακατανίκητες απλότητες. 39 φιλοσοφικές ιστορίες, Athens, Ekdoseis Tou Eikostou Protou, 2006, 198 pp. | ISBN 960-8219-43-4
    Spanish translation by Josefa Linares de la Puerta: 39 (simples) cuentos filosóficos, Madrid, Alianza, 2007, 240 pp. | ISBN 978-84-206-6154-4
    ~ Reissued: 2019 | ISBN 978-84-9181-570-9
    ~ e-book edition: 2019 | ISBN 978-84-9181-589-1
    Chinese translation by Hsu Yuan-Chen (with a new Foreword): 難解的簡單 · 39 杯哲學 Espresso, Taipei, Athena Press, 2007, 227 pp. | ISBN 98-613-7079-8
    ~ New Chinese translation by Tang Tian: 39个 无法逾越 的哲学故事, Guangzhou, Guangdong People’s Publishing House, 2019, 200 pp. | ISBN 97-872-1813-740-7
    Polish translation by Anna Fraś and Aleksandra Maderak: Proste sytuacje nie do rozwiązania. 39 opowiadań filozoficznych, Kraków, Wydawnictwo Znak, 2008, 186 pp. | ISBN 978-83-240-1014-1
    Finnish translation by Risto Koskensilta: Ylittämättömiä yksinkertaisuuksia. Kolmekymmentäyhdeksän filosofista kompakertomusta, Tampere, niin & näin, 2014, 160 pp. | ISBN 978-952-5503-82-1

    Abstract. “Perhaps not all the stories that follow are true. They could, however, be true, and the Reader is invited to ponder this.” So begins this collection of dialogues, epistles, and imaginary documents illustrating the many philosophical conundrums that hide in the wrinkles of everyday life. Why do mirrors seem to invert left and right but not up and down? How do we know whether strawberries taste the same for everyone? Where is it written that we must observe the law? What if we could swap brains—or the rest of our bodies? Is the train we took today the same we took yesterday? Is everything interesting?

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3. Edited Volumes and Journal Issues

  1. 2016, with Rafał Gruszczyński: Mereology and Beyond, Part 2, Vol. 25:3 of Logic and Logical Philosophy, 199 pp. | ISSN 1425-3305

    Abstract. A sequel to [3:2015]. Contributors: E. D. Bøhn, C. Calosi, P. Forrest, J. D. Hamkins and M. Kikuchi, P. Maffezioli, K. G. Niebergall, K. Robering, and P. M. Simons.

  2. 2015, with Rafał Gruszczyński: Mereology and Beyond, Part 1, Vol. 24:4 of Logic and Logical Philosophy, 148 pp. | ISSN 1425-3305

    Abstract. A collection of original papers presenting new work in classical and non-classical mereology and related areas, including mereotopology, mereogeometry, and mereological approaches to the foundations of mathematics and the metaphysics of part-whole composition. Contributors: A. J. Cotnoir, C. Coppola and G. Gerla, G. Hellman and S. Shapiro, A. Pietruszczak, L. Polkowski, and H. Tsai, with an introductory essay by the editors.

  3. 2014b, with Wolfgang-Reiner Mann: Ontological Disagreement, Vol. 111:9/10 of The Journal of Philosophy, 144 pp. | ISSN 0022-362X

    Abstract. A curious thing about the ontological problem, said Quine, is that it can easily be put into three Anglo-Saxon monosyllables: ‘What is there?’. Moreover, for Quine this question can be answered in just a word—‘Everything’. This is merely to say that there is what there is, which is why everyone is supposed to agreee. Yet there remains room for disagreement over cases, as nominalists disagree with platonists, eliminativists with reductionists, materialists with believers in abstract entities, and so on. How are such disagreements to be understood? Are they genuine ontological disagreements, as opposed to merely verbal contretemps? Is there any coherent way at all to express disagreement in matters of ontology? Old as they might be, these questions are still with us and the debate is up and running. Contributors: S. Dasgupta, C. S. I. Jenkins, K. Miller, A. L. Thomasson, and S. Yablo.

  4. 2014a, with Claudio Fontanari: Matematica e filosofia. Contributi al dialogo interdisciplinare [Mathematics and Philosophy. Contributions to the Interdisciplinary Dialogue], Vol. 7:3 of La matematica nella società e nella cultura – Rivista dell’Unione Matematica Italiana, 202 pp. | ISSN 1972-7356

    Abstract. What is mathematics about? Do numbers and other mathematical entities exist independently of human cognition? What is the nature of mathematical knowledge? Is mathematics somehow true of our world, or is it merely a useful fiction? How can mathematics be useful at all in dealing with the concrete physical world? Questions such as these define the scope of the philosophy of mathematics, but they also show that there is a lot of philosophy in mathematics. The aim of this issue is to take a closer look at this claim by considering some philosophical questions that underlie the practice of mathematics, as opposed to its abstract conceptions. Contributors: P. Cantù, V. Giardino, G. Lolli, E. Moriconi, M. Panza and D. Molinini, M. Plebani, G. Rosolini, A. Sereni. Appendix: a 1912 essay by F. Enriques on mathemathics and the theory of knowledge.

  5. 2011, with James P. Tappenden and William E. Seager: Truth and Values. Essays for Hans Herzberger, Calgary, University of Calgary Press [Canadian Journal of Philosophy, Suppl. Vol. 34], viii + 190 pp. | ISBN 978-0-91949-134-2

    Abstract. A selection of essays dedicated to Hans Herzberger with affection and gratitude for both his profound work and his lasting example. Contributors: I. Levi (on whether and how a rational agent should be seen as a maximizer of some cognitive value), C. Normore (on medieval accounts of logical validity), J. P. Tappenden (on the local influences on Frege's doctrines), A. Urquhart (on the inexpressible), A. C. Varzi (on dimensionality and the sense of possibility), and S. Yablo (on content and carvings, and from there to mathematical realism).

  6. 2009, with Elena Casetta: Convenzioni [Conventions], Vol. 49:2 of Rivista di estetica, 208 pp. | ISSN 0035-6212

    Abstract. A collection of new articles on the nature of conventions and on the tenability of conventionalist positions in various areas of philosophy, from metaphysics to epistemology, value theory, logic, and the philosophy of language. Introduction by E. Casetta. Papers by M. Ferraris, L. Franklin-Hall, M. García-Carpintero, F. Guala, A. P. Hazen, K. Miller, L. Morena, M. Rossi and J. Tagliabue, G. Torrengo, V. Tripodi, J. Westerhoff.

  7. 2008: Metafisica. Classici contemporanei [Metaphysics. Contemporary Classics], Rome, Laterza, xi + 536 pp. | ISBN 978-88-420-8382-5
    Reissued (with revisions): 2018 | ISBN 978-88-5813-138-1
    ~ reprinted: 2020.
    e-book edition: 2018 | ISBN 978-88-5813-244-9

    Abstract. This volume brings together, in Italian translation, over thirty selections among the most important and influential works in contemporary analytic metaphysics. The selections are grouped under six major themes: existence (essays by G. E. Moore, W. V. O. Quine, G. Ryle, R. Carnap, H. Putnam), identity (M. Black, D. Wiggins, E. J. Lowe, D. K. Lewis, P. T. Geach, G. Evans), persistence (R. M. Chisholm, P. F. Strawson, W. V. O. Quine, D. K. Lewis, T. Sider), modality (W. V. O. Quine, S. A. Kripke, D. K. Lewis, R. Stalnaker, D. M. Armstrong), properties (B. Russell, D. C. Williams, W. Sellars, D. M. Armstrong), and causation (B. Russell, C. J. Ducasse, D. Davidson, D. H. Mellor, D. K. Lewis, M. Dummett). Each section is preceded by an introduction by the editor along with a comprehensive thematic bibliography.

  8. 2007, with Roberto Casati: Lesser Kinds, Vol. 90:3 of The Monist, 149 pp. | ISSN 0026-9662

    Abstract. Metaphysicians tend to deal with large categories (substance, universals) and oversize issues (the nature of being, existence, necessity, causation). But there is plenty of room at the bottom for lesser categories and entities. Small or undersize problems can be interesting entry points for deep metaphysical enquiries. What is a sound? Do holes exist? Are events fact-like or object-like? Do shadows have a causal structure? What is the nature of the boundary that separates water from air—is it water, is it air? Contributors: I. Aranyosi, J. Dokic, G. Fowler, A. Galton, A. I. Goldman, H. Hudson, K. Miller, C. O’Callaghan, R. Sorensen, J. Spencer, A. Wake.

  9. 2006, with Wolfgang-Reiner Mann: Parts and Wholes, Vol. 103:12 of The Journal of Philosophy, 162 pp. | ISSN 0022-362X

    Abstract. A collection of new articles on the metaphysics of parthood and mereological composition, its hylomorphic variants, and relevant applications to the problem of change and persistence through time. Contributors: K. Fine, H. Hudson, M. Johnston, K. Koslicki, C. Normore, P. M. Simons, P. van Inwagen.

  10. 2005: Time Travel, Vol. 88:3 of The Monist, 143 pp. | ISSN 0026-9662

    Abstract. Quarrels on the possibility of time travel are gaining new interest today as a result of recent work in cosmology and on the theory of causation. They bear also on recent discussions of the problems of free will and personal identity. This issue of The Monist promotes further progress in this debate, with an emphasis on questions such as the following. Is time travel compatible with presentism? Is it compatible with endurantism? Does it entail fatalism? Is the apparent asymmetry between a fixed past and an open future merely an epistemic illusion? Is time travel a travel in time? Contributors: D. Horacek, R. LePoidevin, S. Savitt, T. Sider, J. Simon, M. H. Slater, N. J. J. Smith, G. P. Stevenson, P. B. N. Vranas.

  11. 2004, with Laure Vieu: Formal Ontology in Information Systems. Proceedings of the Third International Conference, Amsterdam, IOS Press, xi + 363 pp. | ISBN 1-58603-468-5

    Abstract. Just as ontology developed over the centuries as part of philosophy, so in recent years ontology has become intertwined with the development of the information sciences. Researchers in various fields have come to realize that a solid foundation for their projects calls for an explicit theorization of the types of entities and relations that make up their respective domains of inquiry, and as the need for integrating such projects arises, so does the need to identify common ontological principles over ad hoc, case-based solutions. This volume collects the papers presented at the third international conference devoted to current research in this area, including invited papers by P. Gärdenfors and A. L. Thomasson.

  12. 2003, with Carola Barbero, Roberto Casati, and Maurizio Ferraris: Bozzetti in memoria di Paolo Bozzi [Papers in Memory of Paolo Bozzi], Vol. 43:3 of Rivista di estetica, 163 pp. | ISSN 0035-6212

    Abstract. A collection of essays in memory of Paolo Bozzi, with a complete bibliography of his work and a previously unpublished essay. Contributors: T. Agostini, T. Andina, A. Arbo, C. Barbero, M. Bertamini, I. Bianchi, V. Braitenberg, N. Bruno, R. Casati and A. C. Varzi, S. Cattaruzza, A. Costall with M. Sinico and G. Parovel, M. L. Dalla Chiara with R. Luciani and G. Toraldo di Francia, A. Dell’Anna, G. Derossi, M. Ferraris, D. Floreano, V. Girotto, D. R. Hofstadter, P. Kobau, M. Kubovy, P. Legrenzi, M. Losito, C. Magris, N. Miscevic, K. Mulligan, L. Pizzo Russo, L. Repici, A. Saccon, U. Savardi, B. Smith, L. Taddio, G. Torrengo, G. Vicario.

  13. 2002, with Luca Morena: Oggetti fiat [Fiat Objects], Vol. 42:2 of Rivista di estetica, 125 pp. | ISSN 0035-6212

    Abstract. A selection of recent philosophical texts—in Italian translation—dealing with the mereology of material objects and the nature of their boundaries. Introduction by L. Morena. Papers by R. M. Chisholm, P. M. Simons, B. Smith, A. Stroll, A. C. Varzi.

  14. 2001: The Philosophy of Geography, Vol. 20:2 of Topoi, 102 pp. | ISSN 0167-7411

    Abstract. Geography has been much neglected by philosophers. Yet geography presents an interesting and intricate trade-off between empirical issues, on the one hand, and deep philosophical issues (from ontology to political philosophy), on the other. What is a geographic entity? What is the relationship between a geographic entity and a physical territory? Can a geographic entity survive without a territory or without definite borders? Can it survive radical changes in its territory? Are there clear-cut identity criteria for geographic categories? Contributors: B. Bennett, R. Casati, J. Collins, A. Galton, B. Smith, A. L. Thomasson, A. C. Varzi, L. Zaibert.

  15. 2000b: Temporal Parts, Vol. 83:3 of The Monist, 140 pp. | ISSN 0026-9662

    Abstract. On the one hand there are entities, such as processes and events, which have temporal parts: the beginning of the race; the middle of the concert; the delicate part of the conversation. On the other hand there are entities, such as material objects, which seem to be present in their entirety at any time at which they exist. The categorial distinction between entities which do, and entities which do not, have temporal parts is grounded in common sense; yet various philosophers have been inclined to oppose it. Some have defended an ontology consisting exclusively of things with no temporal parts. Others have favored ontologies including only temporally extended processes. Others still have endorsed a four-dimensional ontology in which all entities have both spatial and temporal parts. This collection is devoted to the clarification of these views and of their implications for such problems as identity through time, spatiotemporal coincidence, and the possibility of a merging and splitting of objects. Contributors: Y. Balashov, B. Brogaard, K. Fine, M. Heller, R. LePoidevin, J. Parsons, P. M. Simons, P. van Inwagen.

  16. 2000a, with James Higginbotham and Fabio Pianesi: Speaking of Events, New York, Oxford University Press, ix + 295 pp. | ISBN 0-19-512807-9
    Paperback edition: 2000 | ISBN 0-19-512811-7
    e-book edition: 2000 | ISBN 0-58-539434-2

    Abstract. The idea that an adequate semantics of ordinary language calls for some theory of events has sparked considerable debate among linguists and philosophers. On the one hand, so many linguistic phenomena appear to be explained if (and, according to some authors, only if) we make room for logical forms in which reference to or quantification over events is explicitly featured. Examples include nominalization, adverbial modification, tense and aspect, plurals, and singular causal statements. On the other hand, a number of deep philosophical questions arise as soon as we take events into consideration. Are events entities of a kind? What are their identity and individuation criteria? How does semantic theorizing depend on such metaphysical issues? The aim of this book is to address such issues in some depth, with emphasis precisely on the interplay between linguistic applications and philosophical implications. Contributors: N. Asher, P. M. Bertinetto, J. Brandl, D. Delfitto, R. Eckardt, J. Higginbotham, A. Lenci, T. Parsons, A. ter Meulen, H. Verkuyl. A comprehensive introductory essay (pp. 3-47) is included.

  17. 1999: The Nature of Logic, Stanford, CSLI Publications [European Review of Philosophy, Vol. 4], 238 pp. | ISBN 978-15-7586-179-1
    Paperback edition: 1999 | ISBN 978-15-7586-178-4

    Abstract. This volume aims to offer an up-to-date indication of the on-going debate on the nature of logic. The focus is on questions pertaining to the existence and individuation of clear boundaries delineating the concerns of logic: What is their distinctive character? What makes logic a subject of its own, separate from (and generally in the background of) the concerns of other disciplines? What is it for an expression to be a logical constant? Or, perhaps equivalently, what is it for an operation or a relation to be logical? Can these questions be addressed in a general setting, or are they intrinsically unanswerable except within specific frameworks of reference (e.g., a language, or a conceptual scheme)? How are they to be addressed—are they semantic, syntactic, pragmatic? And how do semantics, syntax, or pragmatics contribute to our understanding of these questions? Are the answers fully captured by extant systems of logic? Contributors: E. Bencivenga, J. van Benthem, D. van Dalen, M. García-Carpintero and M. Pérez Otero, A. P. Hazen, A. Koslow, G. Priest, G. Sher.

  18. 1997, with Roberto Casati: Fifty Years of Events. An Annotated Bibliography 1947 to 1997, Bowling Green (OH), Philosophy Documentation Center, 402 pp. | ISBN 0-912632-66-6
    On-line edition: Bowling Green (OH), Philosophy Documentation Center, 2005 | Free access
    Partial preprint: Events: An Annotated Bibliography, Milan, CUEM, 1994, 139 pp.

    Abstract. This bibliography is concerned with recent literature on the nature of events and the place they occupy in our conceptual scheme. The subject has received extensive consideration in the philosophical debate over the last few decades, with ramifications reaching far into the domains of allied disciplines such as linguistics and the cognitive sciences. At the same time, the literature is so wide and widely scattered that it has become very difficult to keep track of all lines of development. This work seeks to overcome this difficutly by offering as comprehensive a record as possible. The listing includes over 1800 entries by some 900 authors. Most entries are annotated, sometimes including brief quotations and cross-references. Detailed Index of Subjects, Index of Names, and Index to Second and Subsequent Authors are included.

  19. 1996, with Roberto Casati: Events, Aldershot, Dartmouth, xxxviii + 519 pp. | ISBN 978-18-5521-663-1

    Abstract. The topic of events has been extensively treated by philosophers under the impact of Davidson’s 1967 paper ‘The Logical Form of Action Sentences’. It is nowadays quite popular also among linguists and cognitive scientists, who often draw from philosophical material. This volume brings together for the first time a representative selection of papers that have indelibly marked the progress of the debate on this topic. The selections are grouped under six major themes: events in semantics (with papers by D. Davidson, J. Higginbotham, and T. Parsons); the nature of events (P. M. S. Hacker, R. M. Chisholm, D. Davidson, W. V. O. Quine, J. Kim, J. Bennett, P. L. Peterson, L. B. Lombard, D. K. Lewis, T. Horgan); identity and individuation (D. Davidson, J. J. Thomson, G. E. M. Anscombe, J. Bennett, A. I. Goldman, K. Bach, L. Davis, M. Brand, C. Cleland); cause, space, and time (D. Davidson, F. I. Dretske, P. M. S. Hacker, M. J. Cresswell); events and processes (A. P. D. Mourelatos, K. Gill, E. Bach, J. E. Cutting). A comprehensive introductory essay (pp. xi–xxxviii) is included.

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4. Articles

  1. 202+: ‘On the Logic of Poetry’, to appear in the proceedings of the conference The Reappearing Pheasant. An Encounter of American and Italian Poets and Critics, New York, Agincourt Press.

    Abstract. Logic and poetry have much more in common than one might initially suppose, beginning with the fact that both foster our sense of possibility. However, logic operates at the level of propositions, whereas poetry is all about sentences. Since two or more sentences can express the same proposition, the difference is not immaterial. Can we, nonetheless, speak of a logic of poetry? I think we can. But it isn’t logic applied to poetry, as with the logic of mathematics or the logic of economics. It is, rather, that complex array of specific choices and decisional processes that underlie poetic composition, the reasons that guide us when crafting individual poems, the justifications we might offer, even if not always, to explain why a certain poem turned out to be the poem it is and not something else. If these justifications resist systematic regimentation and codification, it is because they are always, in every case, inherently specific. And they are inherently specific precisely insofar as they operate at the level of words and sentences rather than propositions.

  2. 2024: ‘I limiti del linguaggio e la via negativa’ [The Limits of Language and the via negativa], in Maurizio Borghi and Ivo De Gennaro (eds.), Verso gli speranti. Scritti in onore di Gino Zaccaria, Milan, Mimesis, 2024, pp. 263–281.

    Abstract. Gino Zaccaria is the philosopher of lexical precision, always in search of the right word for the right concept. In this regard, he is truly Wittgensteinian: what can be said at all can be said clearly. On the other hand, from the fact that we can (and must) say clearly everything that can be said it does not follow that we can say everything we would like to say. How shall we proceed when we hit the expressive limits of language, when no words or neologisms can serve the purpose? In this paper I offer a way to compare Zaccaria’s Heideggerian solution, which relies on the poetic indictum to give voice to the ineffable, with Wittgenstein’s via negativa, according to which the ineffable can only be shown.

  3. 2023b, with Gabriele Pulcini: ‘Complementary Proof Nets for Classical Logic’, Logica Universalis, 17:4 (2023), 411–432.

    Abstract. A complementary system for a given logic is a proof system whose theorems are exactly the formulas that are not valid according to the logic in question. This article is a contribution to the complementary proof theory of classical propositional logic. In particular, we present a complementary proof-net system, CPN, that is sound and complete with respect to the set of all classically invalid (one-side) sequents. We also show that cut elimination in CPN enjoys strong normalization along with strong confluence (and, hence, uniqueness of normal forms).

  4. 2023a, with Paolo Maffezioli: ‘Intuitionistic Mereology II: Overlap and Disjointness’, Journal of Philosophical Logic, 52:4 (2023), 1197–1233.

    Abstract. This paper extends the axiomatic treatment of intuitionistic mereology introduced in [4:2021d] by examining the behavior of constructive notions of overlap and disjointness. We consider both (i) various ways of defining such notions in terms of other intuitionistic mereological primitives, and (ii) the possibility of treating them as mereological primitives of their own.

  5. 2022b: ‘On Perceiving Abs nces’, Gestalt Theory, 44:3 (2022), 213–242.

    Abstract. Can we really perceive absences, i.e., missing things? Sartre tells us that when he arrived late for his appointment at the café, he saw the absence of his friend Pierre. Is that really what he saw? Where was it, exactly? Why didn’t Sartre see the absence of other people who were not there? Why did other people who were there not see the absence of Pierre? The perception of absences gives rise to a host of conundrums and is constantly on the verge of conceptual confusion. Here I focus on the need to be clear about four sorts of distinctions: (i) perceiving an absence vs. perceiving something that is absent; (ii) perceiving an absence vs. an absence of perceiving; (iii) perceiving an absence vs. perceiving something as an absence; and (iv) perceiving an absence vs. perceiving that something is absent.

  6. 2022a: ‘Nothing, Everything, Something!’, in Fosca Mariani Zini (ed.), The Meaning of Something. Rethinking the Logic and the Unity of Ontology, Cham, Springer, 2022, pp. 177–190.

    Abstract. Universalist and nihilist answers to philosophical questions may be extreme, but they are clear enough. Aliquidist answers, by contrast, are typically caught between the Scylla of vagueness and indeterminacy and the Charybdis of ungroundedness and arbitrariness, and steering a proper middle course—saying exactly where in the middle one is going to settle—demands exceptional navigating powers. I myself tend to favor extreme answers precisely for this reason. Here, however, I consider one sense in which Something may claim superiority over its polar competitors, Everything and Nothing, when it comes to answering the ontological question, What is there?

  7. 2021f, with Gabriele Pulcini: ‘Classical Logic through Refutation and Rejection’, in Melvin Fitting (ed.), Selected Topics from Contemporary Logics, London, College Publications, 2021, pp. 667–692.

    Abstract. We offer a critical overview of two sorts of proof systems that may be said to characterize classical propositional logic indirectly (and non-standardly): refutation systems, which prove sound and complete with respect to the set of all classical contradictions, and rejection systems, which prove sound and complete with respect to the larger set of all classical non-tautologies. Systems of the latter sort are especially interesting, since they show that classical propositional logic can be given a paraconsistent characterization. In both cases, we consider Hilbert-style proof systems as well as Gentzen-style sequent calculi and natural-deduction formalisms.

  8. 2021e: ‘Points as Higher-order Constructs: Whitehead’s Method of Extensive Abstraction’, in Stewart Shapiro and Geoffrey Hellman (eds.), The History of Continua: Philosophical and Mathematical Perspectives, Oxford, Oxford University Press, 2021, pp. 347–378.
    Italian translation by Federico Dapor: ‘I punti come costrutti di ordine superiore: il metodo dell’astrazione estensiva di Whitehead’, Atti dell’Accademia roveretana degli Agiati, Classe di Scienze matematiche, fisiche e naturali, X, 3:B (2021), 9–46.

    Abstract. Euclid’s definition of a point as “that which has no part” has been a major source of controversy in relation to the epistemological and ontological presuppositions of classical geometry, from the medieval and modern disputes on indivisibilism to the full development of point-free geometries in the 20th century. Such theories stem from the general idea that all talk of points as putative lower-dimensional entities must and can be recovered in terms of suitable higher-order constructs involving only extended regions (or bodies). Here I focus on what is arguably the first thorough proposal of this sort, Whitehead’s theory of “extensive abstraction”, offering a critical reconstruction of the theory through its successive installments: from the purely mereological version of ‘La théorie relationniste de l’espace’ (1916) to the refined versions presented in An Enquiry Concerning the Principles of Natural Knowledge (1919) and in The Concept of Nature (1920) to the last, mereotopological version of Process and Reality (1929).

  9. 2021d, with Paolo Maffezioli: ‘Intuitionistic Mereology’, Synthese, 198:S18 (2021), 4277–4302.

    Abstract. We present two mereological theories based on a primitive apartness relation along with binary relations of mereological excess and weak excess, respectively. Both theories are shown to be acceptable from the standpoint of constructive reasoning while remaining faithful to the spirit of classical mereology. The two theories are then compared and assessed with regard to their extensional import.

  10. 2021c: ‘Open Questions in Mereotopology’ (Abstract), Bulletin of Symbolic Logic, 27:3 (2021), 324–325.

    Abstract. An overview of some open questions in the field of mereotopology, broadly understood as the study of theories embodying both mereological notions, such as parthood or overlap, and topological notions, such as boundary or connection.

  11. 2021b, with Roberto Casati: ‘Ballot Ontology’, in Sara Bernstein and Tyron Goldschmidt (eds.), Non-Being: New Essay on the Metaphysics of Non-Existence, Oxford, Oxford University Press, 2021, pp. 139–164.

    Abstract. The U.S. presidential election of 2000 was crucially decided in Florida. And, in Florida, the election hinged crucially on a peculiar sort of question: Does this ballot have a hole? “Yes, it does”, so the ballot is valid and ought to be counted. “No it doesn’t”, and the ballot must be discarded. If only one could tell! Where were the hole experts when we needed them? Eventually the matter was thwarted by the Supreme Court and we all gave up. But we did learn something. We learned that even the destiny of a Presidential Election, if not more, might ultimately depend on one’s criteria for identifying holes—not their material surroundings, which everyone could detect, but the holes themselves.

  12. 2021a: ‘What is a City?’, Topoi, 40:2 (2021), 399–408.

    Abstract. Cities are mysteriously attractive. The more we get used to being citizens of the world, the more we feel the need to identify ourselves with a city. Moreover, this need seems in no way distressed by the fact that the urban landscape around us changes continuously: new buildings rise, new restaurants open, new stores, new parks, new infrastructures… Cities seem to vindicate Heraclitus’s dictum: you cannot step twice into the same river; you cannot walk twice through the same city. But, as with the river, we want and need to say that it is the same city we are walking through every day. It is always different, but numerically self-identical. How is that possible? What sort of mysterious thing is a city?

  13. 2020c: ‘Counterpart Theories for Everyone’, Synthese, 197:11 (2020), 4691–4715.

    Abstract. David Lewis’s Counterpart Theory (CT) is often seen as involving a radical departure from the standard, Kripke-style semantics for Modal Logic (ML), suggesting that we are dealing with deeply divergent accounts of our modal talk. However, CT captures but one version of the relevant semantic intuition, and does so on the basis of discretionary metaphysical assumptions (all worlds are equally real, individuals are world-bound). Just as ML can be translated into a language that quantifies explicitly over worlds, CT may be formulated as a semantic theory in which world quantification is purely metalinguistic. And just as Kripke-style semantics is compatible with the doctrine of world-boundedness, a counterpart-based semantics may in principle allow for trans-world identity. In fact, one may welcome a framework that is general enough to include both Lewis’s counterpart-based account and Kripke’s identity-based account as distinguished special cases. There are several ways of doing so. The purpose of this paper is to outline a fully general option and to illustrate its philosophical significance, showing how the large variety of intermediate relations that lie between Lewisian counterparthood and Kripkean identity yield a corresponding variety of modal theories that would otherwise remain uncharted.

  14. 2020b, with Roberto Casati: ‘A Slow Impossible Mirror Picture’, Perception, 49:12 (2020), 1375–1378.

    Abstract. A new type of impossible picture is presented and described. The picture involves an object along with its reflection in a plane mirror, delivering two apparently irreconcilable views of the object itself when seen simultaneously in its flesh and in the mirror. Contrary to other, more familiar impossible pictures, its interpretation requires explicit reasoning about the represented reality. It is a slow impossible picture.

  15. 2020a: ‘Indeterminate Identities, Supervaluationism, and Quantifiers’, Analytic Philosophy, 61:3 (2020), 218–235.

    Abstract. I am a friend of supervaluationism. A statement lacks a definite truth value if, and only if, it comes out true on some admissible ways of precisifying the semantics of the relevant vocabulary and false on others. In this paper, I focus on the special case of identity statements. I take it that such statements, too, may occasionally suffer a truth-value gap, including philosophically significant instances. Yet there is a potentially devastating objection that can be raised against the supervaluationist treatment of such cases—in fact two objections. Luckily, both can be resisted. But seeing how requires that we take a closer look at the ontological presuppositions of supervaluationism, allowing for more leeway than is usually supposed.

  16. 2019f, with Samuel Deng: ‘Methodological Blind Spots in Machine Learning Fairness: Lessons from the Philosophy of Science and Computer Science’, Papers from the Thirty-Third Annual Conference on Neural Information Processing Systems (NeurIPS 2019), Workshop on Human-Centric Machine Learning, online publication.

    Abstract. We use three ideas from the philosophy of science and computer science to tease out methodological blind spots in the assumptions that underlie machine learning fairness: abstraction, induction, and measurement.

  17. 2019e: ‘La metafisica nella filosofia analitica contemporanea’ [Metaphysics in Contemporary Analytic Philosophy], in Enrico Berti (ed.), Storia della metafisica, Roma, Carocci, 2019, pp. 355–384.

    Abstract. An overview of the origins and development of analytic metaphysics. The first part is strictly historical, focusing mainly on Russell and Moore, and then on Wittgenstein, Carnap, and Stebbing, but also on other authors whose work has been more or less directly influential, from Husserl to Twardowski, Kotarbiński, and Leśniewski. The second part deals with later developments, including recent work in ontology and meta-ontology, identity, persistence through time, and the metaphysics of modality.

  18. 2019d: ‘On Three Axiom Systems for Classical Mereology’, Logic and Logical Philosophy, 28:2 (2019), 203–207.

    Abstract. Paul Hovda’s ‘What Is Classical Mereology?’ has fruitfully reshaped the debate concerning the axiomatic foundations of classical mereology. Precisely because of the importance of Hovda’s work and its usefulness as a reference tool, we note here that one of the five axiom systems presented therein, corresponding the ‘Third Way’ to classical mereology, is defective and must be amended. In addition, we note that two other axiom systems, corresponding to the ‘First Way’ and to the ‘Fifth Way’, involve redundancies.

  19. 2019c: ‘The Magic of Holes’, in Giuseppina Marsico and Luca Tateo (eds.), Ordinary Things and Their Extraordinary Meanings, Charlotte (NC), Information Age Publishing, 2019, pp. 21–33.
    Italian translation by Federico Dapor: ‘Il buco nella ciambella’, Atti dell’Accademia roveretana degli Agiati, Classe di Scienze matematiche, fisiche e naturali, X, 2:B (2020), 9–24.

    Abstract. Some thoughts on holes and the challenging metaphysical conundrums they raise, beginning with the obvious question: are there such things, or are holes mere entia representationis, as-if entities, linguistic noise? (This paper draws on [4:2001h] and [4:2014b].)

  20. 2019b: ‘Carnapian Engineering’, in Stefano Borgo, Roberta Ferrario, Claudio Masolo, and Laure Vieu (eds.), Ontology Makes Sense. Essays in Honor of Nicola Guarino, Amsterdam, IOS Press, 2019, pp. 3–23.

    Abstract. Ontology has come to gain huge currency in the information sciences, with techniques, applications, and results vastly exceeding the traditional concerns of philosophy. How did that happen? Where are we heading to? I do not have the answers. But I know what it took and what is needed. It took—and we need—the skills of a good Carnapian engineer, someone capable and willing to build bridges across fields even though each side regards them as a troublesome intruder.

  21. 2019a, with Aaron J. Cotnoir: ‘Natural Axioms for Classical Mereology’, The Review of Symbolic Logic, 12:1 (2019), 201–208.

    Abstract. We present a new axiomatization of classical mereology in which the three components of the theory—ordering, composition, and decomposition principles—are neatly separated. The equivalence of our axiom system with other, more familiar systems is established by purely deductive methods, along with additional results on the relative strengths of the composition and decomposition axioms of each system.

  22. 2018, with Gabriele Pulcini: ‘Paraconsistency in Classical Logic’, Synthese, 195:12 (2018), 5485–5496.

    Abstract. It is natural to think of classical and paraconsistent logics as poles apart. Classical logic is “explosive”, i.e. satisfies the ex contradictione quodlibet; paraconsistent logics, by contrast, admit of non-explosive consequence relations. This way of characterizing the contrast is obviously correct (by definition) if a logic is uniquely characterized by its consequence relation. However, when a consequence relation is decidable, its uniqueness may be disputed and the contrast between classicality and paraconsistency may not be as straightforward. Indeed, there are good reasons to think that classical logic itself is, in an important sense, paraconsistent. For one can identify the set of classical tautologies indirectly, by means of a calculus whose theorems are exactly the non-tautologies. And such as calculus is obviously paraconsistent, since its theorems include contingent sentences along with their negations (but not the tautologies).

  23. 2017c: ‘On Being Ultimately Composed of Atoms’, Philosophical Studies, 174:11 (2017), 2891–2900.

    Abstract. Mereological atomism is the thesis that everything is ultimately composed of atomic parts, i.e., parts lacking proper parts. Standardly, this thesis is characterized by an axiom that says, more simply, that everything has atomic parts. Anthony Shiver (2015) has argued that this characterization is satisfied by models that are not atomistic, and is therefore inadequate. I argue that Shiver’s conclusion can and ought to be resisted, for (i) the models in question are atomistic in the intend-ed sense, and (ii) even though the standard characterization does not say that everything is composed of atoms, it implies so. If there is a sense in which the relevant models are problematic, it lies elsewhere.

  24. 2017b: ‘Il libraio, lo scrittore, la biblioteca di Babele’ [The Bookseller, the Writer, the Library of Babel], Atti dell’Accademia roveretana degli Agiati, Classe di Scienze matematiche, fisiche e naturali, IX, 7:B (2017), 25–33.

    Abstract. A dear friend once told me: the job of a good bookseller, like that of a librarian, is not very different from that of a writer. In each case it is a matter of choosing, of selecting certain books rather than others in the mare magnum of all the books one might consider: all books in print in the bookseller’s case; all existing books in the librarian’s case; all possible books, i.e. all books that could be written, in the writer’s case. Choosing one solution among the many is that part of the job—the most challenging—that unites the writer to the bookseller and the librarian. Indeed, isn’t writing a good book like finding the book we would like to read inside the Library of Babel?

  25. 2017a: ‘All the Shadows Whisper of the Sun. Carnevali’s Whitmanesque Simplicity’, Philosophy and Literature, 41:2 (2017), 360–374.

    Abstract. Why did Emanuel Carnevali submit that short poem to the 1919 Whitman issue of Poetry, if the only apparent connection with Walt Whitman is in the title? He did, I argue, because that poem is as Whitmanesque as one could possibly imagine. Carnevali’s philosophy of the commonplace is more than just an ars poetica of sort. It is Philosophy with the capital ‘P’. It is an endorsement of Whitman’s perspective on things along with that sense of wonder which, as Aristotle said (and Plato before him), is the beginning of all philosophy.

  26. 2016d: ‘On Drawing Lines across the Board’, in Leo Zaibert (ed.), The Theory and Practice of Ontology, London, Palgrave Macmillian, 2016, pp. 45–78.

    Abstract. In his Romanes Lecture of 1907, Lord Curzon emphasized the overwhelming influence of “natural” and “artificial” frontiers in the political history of the modern world. As Barry Smith has shown, the same could be said, more generally, of the natural and artificial boundaries that are at work in articulating every aspect of the reality with which we have to deal, not only in the world of geography, but the world of human experience at large. Moreover, once the natural/artificial distinction has been recognized, it can be drawn across the board: not merely in relation to boundaries but also in relation to those entities that may be said to have boundaries. If something enjoys a natural boundary, its identity and survival conditions do not depend on us; it is a bona fide, mind-independent entity of its own. By contrast, if its boundary is artificial, then the entity itself is to some degree a fiat entity, a product of our worldmaking. Here I am interested in limit case: what if, pace Curzon and pace Smith, all entities turned out to be of the latter sort?

  27. 2016c, with Hsing-chien Tsai: ‘Atoms, Gunk, and the Limits of “Composition”’, Erkenntnis, 81:2 (2016), 231–235.

    Abstract. It is customary practice to define ‘x is composed of the ys’ as ‘x is a sum of the ys and the ys are pairwise disjoint (i.e., no two of them have any parts in common)’. This predicate has played a central role in the debate on the special composition question and on related metaphysical issues concerning the mereological structure of objects. In this note we show that the customary characterization is nonetheless inadequate. We do so by constructing a mereological model where everything qualifies as composed of atoms even though some elements in the domain are gunky, i.e., can be divided indefinitely into smaller and smaller proper parts.

  28. 2016b: ‘Ai limiti del possibile’ [At the Limits of Possibility], in Luca Taddio (ed.), In dialogo con Maurizio Ferraris, Milan, Mimesis, 2016, pp. 91–107.

    Abstract. A Festschrift essay in the form of a dialogue between Hylas and Philonous (the realist philosopher and the anti-realist, after [4:2003j] and [4:2013b]) focusing on modality, specifically on how our metaphysical views concerning reality circumscribe our sense of possibility.

  29. 2016a, with Claudio Calosi: ‘Back to Black’, Ratio, 29:1 (2016), 1–10.

    Abstract. This paper continues the dialogue between A and B initiated by Max Black in ‘The identity of Indiscernibles’. Interlocutor A defends the bundle theory by endorsing the (by now popular) view according to which Black’s world does not contain two indiscernible spheres but rather a single, bilocated sphere. His opponent, B, objects that A cannot distinguish such a world from a world with a single, uniquely located sphere, hence that the view in question adds nothing new to A’s original response to Black’s challenge. A is simply denying that there can be worlds with two or more indiscernible entities.

  30. 2015d: ‘Ipotassi dell’alcunché’ [Hypotaxis of the Something], in Paolo Piccari (ed.), Forme di realtà e modi del pensiero. Saggi in onore di Mariano Bianca, Milan, Mimesis, 2015, pp. 173–176.

    Abstract. A tribute to Mariano Bianca’s work in ontology by contrast with Quine’s (and mine), from the analysis of ‘exists’ to the distinction between perspectival and residual somethings to the eventualist characterization of the layered structure of reality—all in a single, long, very long sentence.

  31. 2015c, with Rafał Gruszczyński: ‘Mereology Then and Now’, Logic and Logical Philosophy, 24:4 (2015), 409–427.

    Abstract. This paper offers a critical reconstruction of the motivations that led to the development of mereology as we know it today, along with a brief description of some problems that define current research in the field. Serves as an introduction to [2:2015].

  32. 2015b, with Giuseppina Marsico: ‘Psychological and Social Borders: Regulating Relationships’, in Jaan Valsiner, Giuseppina Marsico, Nandita Chaudhary, Tatsuya Sato, and Virginia Dazzani (eds.), Psychology as the Science of Human Being, Cham, Springer, 2015, pp. 327–336.

    Abstract. Psychological phenomena take place at the border between person and environment. Indeed, psychology as a whole may be seen as a science of human liminal constructions, a science concerned with the dynamic relationships that exist between people and what surrounds them and with the constant border crossing that defines the arena within which human development takes place. From this perspective, the central question is: how do humans deal with such transitions throughout their lives? Cultural psychology offers a way of addressing, theoretically and empirically, the epistemological and social dimensions of this question. In addition, we argue that mereotopology—the theory of the relations of part to whole and of part to part within a whole—provides a conceptual framework of enormous potential for appreciating its unexplored ontological underpinnings, thus contributing to the foundations of psychology as a developmental science of the inherent uncertainty that accompanies all individual and social becoming.

  33. 2015a, with Walter A. Carnielli and Gabriele Pulcini: ‘Is Complementary Classical Logic Really a Logic?’ (Abstract), in NAT@Logic 2015 – Book of Abstracts, Natal, RN: Universidade Federal do Rio Grande do Norte, 2015, pp. 82–84.

    Abstract. We consider a complementarization cLK of the classical sequent calculus LK and show how to enrich it with cut rules. We then provide an efficient normalization procedure and prove that it is both strongly normalizing and strongly confluent. This implies uniqueness of the normal form. Since normalization in cLK yields a simplification of proofs, we take this to show that the study of complementarity can have useful applications. We conclude by addressing the philosophical question of whether cLK can be considered a logic to all intents and purposes.

  34. 2014l, with Wolfgang-Reiner Mann: ‘Ontological Disagreement: Foreword’, The Journal of Philosophy, 111:9/10 (2014), 449–453.

    Abstract. An introductory note to [2:2014b], setting the background for the five papers included in the rest of the issue (by S. Dasgupta, C. S. I. Jenkins, K. Miller, A. L. Thomasson, and S. Yablo).

  35. 2014k: ‘Formal Theories of Parthood’, in Claudio Calosi and Pierluigi Graziani (eds.), Mereology and the Sciences: Parts and Wholes in the Contemporary Scientific Context, Berlin, Springer, 2014, pp. 359–370.

    Abstract. A compact overview of the main formal theories of parthood and of their mutual relationships, up to Classical Extensional Mereology. Written as an Appendix to the other essays included in the volume.

  36. 2014j, with Claudio Calosi: ‘De li accidiosi che son avversi al possibile’ [Of the Sullen Hight Adverse to the Possible], Rivista Italiana di Filosofia Analitica Junior, 5:2 (2014), 101–127.

    Abstract. This is a supplement to [2:2014]. It features an entirely new canto of the poem Le tribolazioni del filosofare (originally thought to be lost) along with an extensive commentary. The canto covers the first ring of the circle of the Sullen, which hosts the Adverse to the Possible, and deals with several philosophical questions concerning the metaphysics of modality.

  37. 2014i: ‘Counting and Countenancing’, in Aaron J. Cotnoir and Donald L. M. Baxter (eds.), Composition as Identity, Oxford, Oxford University Press, 2014, pp. 47–69.

    Abstract. I endorse Composition as Identity, broadly and loosely understood as the thesis that a composite whole is nothing over and above its parts, and the parts nothing over and above the whole. Thus, given an object, x, composed of n proper parts, y1, ..., yn, I feel the tension between my Quinean heart and its Lewisian counterpart. I feel the tension between my obligation to countenance n+1 things, x and the y’s, each of which is a distinct portion of reality, and my inclination to count just 1 thing, x, or just n things, the y’s, the former encompassing the same amount of reality as the latter. This paper is an attempt to reconstruct this tension and to explain it away without forgoing the intimate link between counting and countenancing.

  38. 2014h: ‘Realism in the Desert’, in Fabio Bacchini, Stefano Caputo, and Massimo Dell’Utri (eds.), Metaphysics and Ontology without Myths, Newcastle, Cambridge Scholars, 2014, pp. 16–31.

    Abstract. Quine’s desert is generally contrasted with Meinong’s jungle, as a sober ontological alternative to the exuberant luxuriance that comes with the latter. Here I focus instead on the desert as a sober metaphysical alternative to the Aristotelian garden, with its tidily organized varieties of flora and fauna neatly governed by fundamental laws that reflect the essence of things and the way they can be, or the way they must be. In the desert there are no “natural joints”; all the boundaries we find are lines we have drawn, artificial fencings that merely reflect our own demarcations, our classifications, our desperate need to ward off the flux and meet an excusable but ungrounded demand for order and stability. The desert returns a picture of reality that is radically anti-realist. And yet the picture does not amount to a form of irrealism. The desert is out there and is what it is regardless of how we feel. And it is not completely structureless. It’s just that the structure it has is very thin and does not correspond to the sort of structure that so-called metaphysical realists—and scientific realists alike—tend to attribute to it.

  39. 2014g, with Claudio Fontanari: ‘Matematica e filosofia: Prefazione’ [Mathematics and Philosophy: Foreword], La matematica nella società e nella cultura. Rivista dell’Unione Matematica Italiana, 7:3 (2014), 317–318.

    Abstract. A brief introductory note to [2:2014a], setting the background for the eight papers included in the rest of the issue (by P. Cantù, V. Giardino, G. Lolli, E. Moriconi, M. Panza and D. Molinini, M. Plebani, G. Rosolini, A. Sereni).

  40. 2014f, with Marion Haemmerli: ‘Adding Convexity to Mereotopology’, in Pawel Garbacz and Oliver Kutz (eds.), Formal Ontology in Information Systems. Proceedings of the Eighth International Conference, Amsterdam, IOS Press, 2014, pp. 65–78.

    Abstract. Convexity predicates and the convex hull operator continue to play an important role in theories of spatial representation and reasoning, yet their first-order axiomatization is still a matter of controversy. In this paper, we present a new approach to adding convexity to mereotopological theory with boundary elements by specifying first-order axioms for a binary segment operator s. We show that our axioms yields a convex hull operator h that supports, not only the basic properties of convex regions, but also complex properties concerning region alignment. We also argue that h is stronger than convex hull operators from existing axiomatizations and show how to derive the latter from our axioms for s.

  41. 2014e: ‘Because’, in Anne Reboul (ed.), Mind, Values, and Metaphysics. Philosophical Essays in Honor of Kevin Mulligan, Volume 1, Berlin, Springer, 2014, pp. 253–256.
    Preprinted in Anne Reboul (ed.), Philosophical Papers Dedicated to Kevin Mulligan, Université de Genève, Département de Philosophie, 2011 (online publication).

    Abstract. There is a natural philosophical impulse (and, correspondingly, a great deal of pressure) to always ask for explanations, for example, explanations of why we act as we do. Kevin Mulligan has gone a very long way in disentangling the many different because’s, and the many senses of ‘because’, that tend to clutter our efforts to manage that impulse. This short dialogue is meant as a humble tribute to his work in this area.

  42. 2014d: ‘Logic, Ontological Neutrality, and the Law of Non-Contradiction’, in Elena Ficara (ed.), Contradictions. Logic, History, Actuality, Berlin, De Gruyter, 2014, pp. 53–80.

    Abstract. As a general theory of reasoning—and as a general theory of what holds true under every possible circumstance—logic is supposed to be ontologically neutral. It ought to have nothing to do with questions concerning what there is, or whether there is anything at all. It is for this reason that traditional Aristotelian logic, with its tacit existential presuppositions, was eventually deemed inadequate as a canon of pure logic. And it is for this reason that modern quantification theory, too, with its residue of existentially loaded theorems and patterns of inference, has been claimed to suffer from a defect of logical purity. The law of non-contradiction rules out certain circumstances as impossible—circumstances in which a statement is both true and false, or perhaps circumstances where something both is and is not the case. Is this to be regarded as a further ontological bias? If so, what does it mean to forego such a bias in the interest of greater neutrality—and ought we to do so?

  43. 2014c: ‘Del fuoco che non brucia: risposte, riflessioni, ringraziamenti’ [The Fire that Doesn’t Burn: Responses, Reflections, and Thanks], in Elena Casetta and Valeria Giardino (eds.), Mettere a fuoco il mondo. Conversazioni sulla filosofia di Achille Varzi, special issue of Isonomia – Epistemologica, 4 (2014), 111–153.

    Abstract. An overview of the way I picture the amorphous world we live in, built around my comments and responses to nine festschrift essays by A. Borghini (on the Fedro metaphor and the art of butchery), F. Calemi (on the predication principle and metalinguistic nominalism), C. Calosi (on the argument from mereological universalism to extensonality), E. Casetta (on the role of “monsters” in the realism/antirealism debate), V. Giardino (on inductive reasoning, spatial representation, and problem solving), P. Graziani (on mereological notation), P. Pedrini (on the distinction between natural and artificial boundaries), D. Santoro (on causation by omission), and G. Torrengo (on absolute vs. relational space and the problem of incongruent counterparts).

  44. 2014b: ‘Qu’est-ce qu’un trou dans l’emmental?’ [What Is a Hole in Emmentaler?], in Anne Meylan and Olivier Massin (eds.), Aristote chez les Helvètes. Douze essais de métaphysique helvétique, Paris, Ithaque, 2014, pp. 41–46.

    Abstract. Emmentaler always comes with holes. That is the beauty of a piece of Emmentaler—its essence. Does it follow, then, that when we buy a piece of Emmentaler we really buy two sorts of thing, the edible stuff plus the small chunks of void that come with it? Traditional wisdom says No. The cheese is all there is. When we say that there are holes in it, we are merely saying that it—the cheese—is perforated. We better say Yes. You can’t talk about a piece of Emmentaler without taking the holes seriously. You can’t get rid of the holes by treating them as mere façons de parler. And even if you could, so what? The holes may be there regardless. The holes are there even though, as Kurt Tucholsky put it, really a hole is where something isn’t.

  45. 2014a: ‘Musil’s Imaginary Bridge’, The Monist, 97:1 (2014), 30–46.

    Abstract. In a calculation involving imaginary numbers, we begin with real numbers that represent concrete measures and we end up with numbers that are equally real, but in the course of the operation we find ourselves walking “as if on a bridge that stands on no piles”. How is that possible? How does that work? And what is involved in the as-if stance that this metaphor introduces so beautifully? These are questions that bother Törless deeply. And that Törless is bothered by such questions is a central question for any reader of Törless. Here I offer my interpretation, along with a reconstruction of the philosophical intuition that lies behind it all.

  46. 2013e: ‘Cover to Cover’, Current Musicology, 95 (2013), 177–191.

    Abstract. Paul Goguen once said that art is either plagiarism or revolution. That is certainly true of music. From pop to jazz to classical music, there’s a long history of borrowing, lifting, and stealing from other composers, along with other ways of building on their artistic contributions. Here I try to put some order in the complex picture that emerges from such a history, with an eye to the criteria—if any—that underlie the complex ways in which we compare, identify, and categorize musical works.

  47. 2013d: ‘Livelli di realtà e descrizioni del mondo’ [Levels of Reality and World Descriptions], Giornale di metafisica, 35:2/3 (2013), 387–404.
    Spanish translation by Francesco Consiglio: ‘Niveles de realidad y descripciones del mundo’, Disputatio, 4:5 (2015), pp. 29–49.

    Abstract. I articulate and the defend the following two claims: (i) it is a mistake to think that the structure of the world should mirror the structure of the theories by which we represent it, and through which we try to decipher it, simply because those theories appear to work; (ii) among the most deplorable consequences of this mistake is the widespread tendency to think that there must be a plurality of realities, or several different and irreducible levels of a stratified reality, merely because our credo includes a plurality of theories each of which appears to be as important and trustworthy as it is irreducible to (if not overtly in conflict with) the others.

  48. 2013c: ‘Undetached Parts and Disconnected Wholes’, in Christer Svennerlind, Jan Almäng, and Rögnvaldur Ingthorsson (eds.), Johanssonian Investigations. Essays in Honour of Ingvar Johansson on His Seventieth Birthday, Frankfurt, Ontos Verlag, 2013, pp. 696–708.

    Abstract. This paper expands on [4:2002g]. I offer a diagnosis of the parallelism between the Doctrine of Potential Parts and the Doctrine of Potential Wholes and briefly examine its bearing on Johansson’s account of the Tibbles-Tib Problem.

  49. 2013b, with Maurizio Ferraris: ‘Hylas e Philonous dieci anni dopo’ [Hylas and Philonous Ten Years Later], SpazioFilosofico, 8:2 (2013), 219–227.
    Reprinted as ‘Possibilità’ [Possibility], in Maurizio Ferraris, Realismo positivo, Turin, Rosenberg & Sellier, 2013, pp. 85–103.
    ~ English translation by Sarah de Sanctis: ‘Possibility’, in Maurizio Ferraris, Positive Realism, Alresford, Zero Books, 2015, pp. 49–62.
    ~ Spanish translation by Jimmy Hernández Marcelo: ‘Posibilidad’, in Maurizio Ferraris, Realismo positivo, Segovia, Materia-Oscura Editorial, 2023, pp. 89–102.

    Abstract. This is a sequel to the dialogue in [4:2003j], focusing on the interplay between what there is and what there could be—between actuality and possibility—from the perspective of Hylas (here: the realist philosopher) and from the perspective of Philonous (here: the conventionalist anti-realist).

  50. 2013a: ‘Fictionalism in Ontology’, in Carola Barbero, Maurizio Ferraris, and Alberto Voltolini (eds.), From Fictionalism to Realism, Newcastle, Cambridge Scholars, 2013, pp. 133–151.
    Reprinted in Rivista di Estetica, 56:2 (2014), pp. 253–270.

    Abstract. Fictionalism in ontology is a mixed bag. Here I focus on three main variants—which I label after the names of Pascal, Berkeley, and Hume—and consider their relative strengths and weaknesses. The first variant is just a version of the epistemic Wager, applied across the board. The second variant builds instead on the fact that ordinary language is not ontologically transparent; we speak with the vulgar, but deep down we think with the learned. Finally, on the Humean variant it’s the structure of the ontological inventory, not its content, that may turn out to involve fictional elements. That is, for the Humean the fiction lies, not in the reality of common-sense ontology, but in the laws—of unity, identity, causation, etc.—in terms of which we articulate our experience of that reality. In the end, this is the kind of fictionalism that I find most interesting, sensible, and tenable. And I argue that it is even compatible with the sort of “naive” realism we have all come to appreciate in the work of Paolo Bozzi, to whom the paper is dedicated.

  51. 2012: ‘The Naming of Facts’, Analysis, 72:2 (2012), 322–323.

    Abstract. The naming of facts is a difficult matter / it isn’t just one of your holiday games... A versification of a disturbing philosophical problem, after T. S. Eliot’s ‘The Naming of Cats’.

  52. 2011c: ‘On Doing Ontology without Metaphysics’, Philosophical Perspectives, 25 (2011), 407–423.

    Abstract. According to a certain familiar way of dividing up the business of philosophy, ontology is concerned with the question of what entities exist (a task that is often identified with that of drafting a “complete inventory” of the universe) whereas metaphysics seeks to explain, of those entities, what they are (i.e., to specify the “ultimate nature” of the items included in the inventory). This distinction carries with it a natural thought, namely, that ontology is in some way prior to metaphysics. One must first of all figure out what things exist (or might exist); then one can attend to the further question of what they are, specify their nature, speculate on those features that make each thing the thing it is. I sympathize with that thought, but there is a major worry lurking in the background and there are several complications that emerge in the foreground. The purpose of this paper is to address such worries and complications and to come up with a plausible way of understanding the “priority thesis” that makes it both reasonable and, hopefully, useful. (The paper expands on the view put forward in [4:2007f] and [4:2003g].)

  53. 2011b: ‘The Plan of a Square’, in James P. Tappenden, Achille C. Varzi, and William E. Seager (eds.), Truth and Values: Essays for Hans Herzberger, Calgary, University of Calgary Press, 2011, pp. 137–144.

    Abstract. An imaginary report of Square’s plans for a journey aimed to find out whether the topology of Flatland is sphere-like or torus-like, intended as a trubute to Hans Herzberger’s uncompromising philosophical style, courage, and passion. (This paper is based on [7:2003]).

  54. 2011a: ‘Boundaries, Conventions, and Realism’, in Joseph K. Campbell, Michael O’Rourke, and Matthew H. Slater (eds.), Carving Nature at Its Joints: Natural Kinds in Metaphysics and Science, Cambridge (MA), MIT Press, 2011, pp. 129–153.
    Abridged version: ‘Carving Nature at Our Joints’, in Tadeusz Czarnecki, Katarzyna Kijania-Placek, Olga Poller, and Jan Wolenski (eds.), The Analytical Way. Proceedings of the 6th European Congress of Analytic Philosophy, London, College Publications, 2010, pp. 85–101.

    Abstract. This is a much expanded English version of [4:2005b], with an emphasis on the advantages of conventional realism over (a) Berkeleyan idealism, (b) Goodmanian irrealism, (c) Putnamian relativism, and (d) Postmodern anything-goes-ism.

  55. 2010b: ‘Modalità e verità’ [Modality and Truth], in Andrea Borghini (ed.), Il genio compreso. La filosofia di Saul Kripke, Rome, Carocci, 2010, pp. 21–76, 186–191.

    Abstract. An introduction to Kripke’s semantics for propositional and quantified modal logic (with special reference to its historical development from the original 1959 version to the extended versions of 1963 and 1965) and to his theory of truth.

  56. 2010a: ‘On the Boundary between Material and Formal Ontology’, in Barry Smith, Riichiro Mizoguchi, and Sumio Nakagawa (eds.), Interdisciplinary Ontology, Vol. 3: Proceedings of the Third Interdisciplinary Ontology Meeting, Tokyo, Keio University Press, 2010, pp. 3–8.
    French translation by Nicolas Liabeuf: ‘Sur la frontière entre ontologie matérielle et ontologie formelle’, Revue Étudiante de Philosophie Analytique, 3 (2011), 53–65.

    Abstract. There are two main ways, philosophically, of characterizing the business of ontology. On one account, made popular by Quine, ontology is concerned with the material question of what there is. On the other, which made its way into our times through Brentano and his pupils, ontology is concerned with the task of laying bare the formal structure of all there is, whatever it is. My question, here, is whether one can pursue one sort of theory without also engaging in the other—whether, or to what extent, the tasks of material ontology presuppose the backing of some formal-ontological theory, and whether or to what extent formal ontology can be, in the material sense of the term, ontologically neutral.

  57. 2009c: ‘Universalism Entails Extensionalism’, Analysis, 69:4 (2009), 599–604.

    Abstract. I argue that Universalism (the thesis that mereological composition is unrestricted) entails Extensionalism (the thesis that sameness of composition is sufficient for identity) as long as the parthood relation is transitive and satisfies the Weak Supplementation principle (to the effect that whenever a thing has a proper part, it has another part disjoint from the first).

  58. 2009b: ‘È successo tra qualche anno’ [It Happened in a Few Years], in Armando Massarenti (ed.), Stramaledettamente logico. Esercizi di filosofia su pellicola, Rome, Laterza, 2009, pp. 3–32 (reissued: Milano, Mondolibri, 2010).

    Abstract. A discussion of some philosophical themes in the Terminator film series, including: the possibility of time travel, backward causation, the difference between changing the past/future and affecting it, the difference between determinism and fatalism, and how such issues depend on the underlying philosophy of time (eternism vs. presentism vs. the growing-block theory).

  59. 2009a: ‘On the Interplay between Logic and Metaphysics’, Linguistic and Philosophical Investigations, 8 (2009), 13–36.

    Abstract. On the one hand, logic has (or ought to have) nothing to do with metaphysics; it ought to have nothing to do with questions concerning what there is, or whether there is anything at all. On the other hand, metaphysics can hardly get off the ground without the help of logical analysis; to be is to be a truth-maker, and the search for truth-makers requires that we lay open the logical structure of our language. So something’s gotta give: either logical analysis is metaphysically biased, or metaphysicians must make up their mind before resorting to logical analysis. Or both. (The second part of this paper has some overlap with [4:2007e].)

  60. 2008j: ‘Failures, Omissions, and Negative Descriptions’, in Kepa Korta and Joana Garmendia (eds.), Meaning, Intentions, and Argumentation, Stanford, CSLI Publications, 2008, pp. 61–75.
    Italian translation by Giuliano Torrengo: ‘Mancanze, omissioni e descrizioni negative’, Rivista di estetica, 46:2 (2006), 109–127.

    Abstract. This paper is a condensed and unified version of [4:2006f] and [4:2007b].

  61. 2008i: ‘The Extensionality of Parthood and Composition’, The Philosophical Quarterly, 58:1 (2008), 108–133.

    Abstract. I focus on three mereological principles: the Extensionality of Parthood (EP), the Uniqueness of Composition (UC), and the Extensionality of Composition (EC). These principles are not equivalent. Nonetheless, they are closely related (and often equated) as they all reflect the basic nominalistic dictum, No difference without a difference maker. And each one of them—individually or collectively—has been challenged on philosophical grounds. In the first part I argue that such challenges do not quite threaten EP insofar as they are either self-defeating or unsupported. In the second part I argue that they hardly undermine the tenability of EC and UC as well.

  62. 2008h, with Elena Casetta: ‘Nomi in crisi di identità’ [Names in an Identity Crisis], Rivista di estetica, 48:2 (2008), 143–156.

    Abstract. An exchange of letters among proper names and natural-kind terms, dealing with various identity and individuation problems (rigid designation, use-mention ambiguities, translation) from their point of view.

  63. 2008g, with Roberto Casati: ‘Event Concepts’, in Thomas F. Shipley and Jeff Zacks (eds.), Understanding Events: From Perception to Action, New York, Oxford University Press, 2008, pp. 31–54.

    Abstract. Events are center stage in several fields of psychological research. There is a long tradition in the study of event perception, event recognition, event memory, event conceptualization and segmentation. There are studies devoted to the description of events in language and to their representation in the brain. There are also metapsychological studies aimed at assessing the nature of mental events or the grounding of intentional action. Outside psychology, the notion of an event plays a prominent role in various areas of philosophy as well as in such diverse disciplines as linguistics, probability theory, artifical intelligence, physics, and—of course— history. This plethora of concerns and applications is indicative of the prima facie centrality of the notion of an event in our conceptual scheme, but it also gives rise to some important methodological questions. Can we identify a core notion that is preserved across disciplines? Does this notion, or some such notion, correspond to the pre-theoretical conception countenanced by common sense? Does it correspond to a genuine metaphysical category?

  64. 2008f: ‘Il catalogo universale’ [The Universal Catalogue], in Roberto Finzi and Paolo Zellini (eds.), Forme della ragione, Bologna, CLUEB, 2008, pp. 91–113.

    Abstract. There are more things between heaven and earth than are dreamt of in our philosophy, says Hamlet. Right. But there are also philosophies that have dreamt of things that are neither here nor there, as Goodman says. There is a danger of suffering from ontological myopia just as there is a danger of suffering from ontological allucination. This paper is about some basic strategies that are available to (or have been elaborated by) philosophers to steer clear of both dangers in their efforts to draw up a good inventory of what there is.

  65. 2008e: ‘Mondo-versioni e versioni del mondo’ [World-Versions and Versions of the World], Preface to the second Italian edition of Nelson Goodman, Vedere e costruire il mondo, Rome, Laterza, 2008, pp. vii–xxiv.

    Abstract. Some reflections on Nelson Goodman’s ontological pluralism (as emerging from his Ways of Worldmaking) and its influence on contemporary philosophy, taking the querelle with Quine in the columns of The New York Review of Books as a starting point.

  66. 2008d: ‘Patterns, Rules, and Inferences’, in Jonathan E. Adler and Lance J. Rips (eds.), Reasoning: Studies of Human Inference and Its Foundations, Cambridge, Cambridge University Press, 2008, pp. 282–290.
    Italian translation by Maurizio Dapor: ‘Configurazioni, regole e inferenze’, Atti dell’Accademia roveretana degli Agiati, Classe di Scienze matematiche, fisiche e naturali, IX, 2:B (2012), 5–24.
    ~ Abridged version: ‘Regole nascoste e leggi di natura’ [Hidden Rules and Laws of Nature], in Pier Luigi Lecis, Vinicio Busacchi, and Pietro Salis (eds.), Realtà, verità, rappresentazione, Milan, Franco Angeli, 2015, pp. 311–326.

    Abstract. The “Game of the Rule” is easy enough: I give you the beginning of a sequence of numbers (say) and you have to figure out how the sequence continues, to uncover the rule by means of which the sequence is generated. The game depends on two obvious constraints, namely (1) that the initial segment uniquely identify the sequence, and (2) that the sequence be non-random. As it turns out, neither constraint can fully be met, among other reasons because the relevant notion of randomness is either vacuous or undecidable. This may not be a problem when we play for fun. It is, however, a serious problem when it comes to playing the game for real, i.e., when the player to issue the initial segment is not one of us but the world out there, the sequence consisting not of numbers (say) but of the events that make up our history. Moreover, when we play for fun we know exactly what initial segment to focus on, but when we play for real we don’t even know that. This is the core difficulty in the philosophy of the inductive sciences.

  67. 2008c: ‘Vaghezza e ontologia’ [Vagueness and Ontology], in Maurizio Ferraris (ed.), Storia dell’ontologia, Milan, Bompiani, 2008, pp. 672–698.

    Abstract. On the opposition between de re and de dicto conceptions of vagueness, with special reference to their bearing on the tasks of ontology.

  68. 2008b: ‘Che cos’è un derivato? Appunti per una ricerca tutta da fare’ [What Is a Derivative? Notes for a Long-Term Project], Appendix to Alberto Berrini, Le crisi finanziarie”, Saronno, Monti, 2008, pp. 143–171.
    Reprinted with revisions as ‘Il filosofo e i prodotti derivati’ [A Philosopher’s Look at Derivative Products], Quaderni dell’Associazione per lo Sviluppo degli Studi di Banca e Borsa, 38 (2009), 17–43.

    Abstract. This is a sequel to [4:2007j], focusing on the metaphysics of those peculiar social objects that play an increasingly central role in the financial world—derivatives. On the analysis I offer, they appear to run afoul of Searle’s theory of social objects (or of the theory outlined in my earlier paper), and I put forward some suggestions on where to look for the necessary adjustments.

  69. 2008a, with Roberto Casati: ‘Voti e altri buchi elettorali’ [Ballots and Other Polling Holes], Rivista di estetica, 48:1 (2008), 169–194.

    Abstract. A philosophical dialogue on the functioning, the limits, and the paradoxes of our electoral practices, dealing with such basic questions as: What is a vote? How do we count votes? And do votes really count?

  70. 2007k: ‘Supervaluationism and Its Logics’, Mind, 116:463 (2007), 633–676.

    Abstract. What sort of logic do we get if we adopt a supervaluational semantics for vagueness? As it turns out, the answer depends crucially on how the standard notion of validity as truth preservation is recasted. There are several ways of doing that within a supervaluational framework, the main alternative being between “global” construals (e.g., an argument is valid iff it preserves truth-under-all-precisifications) and “local” construals (an argument is valid iff, under all precisifications, it preserves truth). The former alternative is by far more popular, but I argue in favor of the latter, for (i) it does not suffer from a number of serious objections, and (ii) it makes it possible to restore global validity as a defined notion.

  71. 2007j: ‘Il denaro è un’opera d’arte (o quasi)’ [Money Is (almost) a Work of Art], Quaderni dell’Associazione per lo Sviluppo degli Studi di Banca e Borsa, 24 (2007), 17–39.
    Section 5 reprinted in Inside Art, 8:82 (2011), 21.

    Abstract. What is money? Paraphrasing Goodman, I say that’s the wrong question to ask. The right question is, When is money? And to get the answer, Searle’s general formula for social objects (X couns as Y in context C) is fine, as long as you give it a different reading.

  72. 2007i: ‘Spatial Reasoning and Ontology: Parts, Wholes, and Locations’, in Marco Aiello, Ian E. Pratt-Hartmann, and Johan van Benthem (eds.), Handbook of Spatial Logics, Berlin, Springer, 2007, pp. 945–1038.

    Abstract. A critical survey of the fundamental philosophical issues in the logic and formal ontology of space, with special emphasis on the interplay between mereology (the theory of parthood relations), topology (broadly understood as a theory of qualitative spatial relations such as continuity and contiguity), and the theory of spatial location proper.

  73. 2007h, with Roberto Casati: ‘Lesser Kinds: Foreword’, The Monist, 90:3 (2007), 331–332.

    Abstract. A brief introductory note to [2:2007], setting the background for the nine papers included in the rest of the issue (by I. Aranyosi, J. Dokic, A. Galton, A. I. Goldman, H. Hudson, K. Miller, C. O’Callaghan, R. Sorensen, and A. Wake with J. Spencer and G. Fowler).

  74. 2007g: ‘Promiscuous Endurantism and Diachronic Vagueness’, American Philosophical Quarterly, 44:2 (2007), 181–189.

    Abstract. According to a popular line of reasoning, diachronic vagueness creates a problem for the endurantist conception of persistence. Some authors have replied that this line of reasoning is inconclusive, since the endurantist can subscribe to a principle of Diachronic Unrestricted Composition (DUC) that is perfectly parallel to the principle required by the perdurantist’s semantic account. I object that the endurantist should better avoid DUC. And I argue that even DUC, if accepted, would fail to provide the endurantist with the necessary resources for explaining diachronic vagueness in familiar semantic terms.

  75. 2007f: ‘Sul confine tra ontologia e metafisica’ [On the Boundary between Ontology and Metaphysics], Giornale di metafisica, 29:2 (2007), 285–303.

    Abstract. An examination and defense of the view according to which ontology, understood as the theory of what there is, comes before (and can be done without engaging in) metaphysics, understood as the theory of the nature of things.

  76. 2007e: ‘From Language to Ontology: Beware of the Traps’, in Michel Aurnague, Maya Hickmann, and Laure Vieu (eds.), The Categorization of Spatial Entities in Language and Cognition, Amsterdam, John Benjamins, 2007, pp. 269–284.

    Abstract. Is there any way of telling what sorts of things there are given the sorts of things we say? Alas, there isn’t. Surely the surface grammar is full of traps. But neither can we trust the deep structure, for there is no unique way of telling what it is. No analysis can reveal the deep structure of a given statement; at most we can fix a deep structure for the statement, by dint of resisting alternative interpretations. Depending on what we think there is, we must attach a meaning to what we say. Going the other way around is illegitimate; it amounts to a attributing our ontological views to the language we share with others. (This paper expands on sections 2 and 3 of [4:2002b].)

  77. 2007d: ‘Che cosa ci facciamo qui?’ [What Are We Doing Here?], in Sandro Montalto (ed.), Umberto Eco: l’uomo che sapeva troppo, Pisa, Edizioni ETS, 2007, pp. 253–256.

    Abstract. A short dialogue around the question of whether the thoughts expressed by the characters of an historical novel belong to the characters or to the author.

  78. 2007c: ‘La natura e l’identità degli oggetti materiali’ [The Nature and Identity of Material Objects], in Annalisa Coliva (ed.), Filosofia analitica. Temi e problemi, Rome, Carocci, 2007, pp. 17–56.

    Abstract. A critical survey of the main metaphysical theories concerning the nature of material objects (substratum theories, bundle theories, substance theories, stuff theories) and their identity conditions, both synchronic (monist vs. pluralist theories) and diachronic (three-dimensionalism, four-dimensionalism, sequentialism).

  79. 2007b, with Matthew H. Slater: ‘Playing for the Same Team Again’, in Jerry L. Walls and Gregory Bassham (eds.), Basketball and Philosophy. Thinking Outside the Paint, Lexington (KY), University Press of Kentucky, 2007, pp. 220–234.

    Abstract. How many championships have the Lakers won? Fourteen, if one counts those won in Minneapolis; nine, otherwise. Which is the correct answer? Is it even obvious that there is a correct answer? One is tempted to identify a team with its players. But teams, like ordinary objects, seem to survive gradual turnover of their parts. Suppose players from the Lakers are gradually replaced, one by one, over the years. We have the intuition that the team persists through this change, even after none of the original players remain. Suppose too that these original players wind up playing for the Celtics. Lakers fans face an awkward question: for whom should they root? On the one hand, they have the team currently playing in L.A.—a team that has continued gradually through the years, who wear the same uniforms, but now can’t make the playoffs. On the other hand, there are the beloved Lakers starting five (responsible for all those championships) now playing together in the hated Boston garden—a team which looks (despite wearing those hated Celtics jerseys) and plays just like the Lakers of old. What’s a loyal fan to do?

  80. 2007a: ‘Omissions and Causal Explanations’, in Francesca Castellani and Josef Quitterer (eds.), Agency and Causation in the Human Sciences, Paderborn, Mentis Verlag, 2007, pp. 155–167.

    Abstract. In [4:2006f] I argue that talk about negative events should not be taken at face value: typically, what we are inclined to think of as a negative event (John’s failure to go jogging) is just an ordinary, positive event (his going to the movie instead); it is a positive event under a negative description. Here I consider more closely the difficulties that arise in those cases where no positive event seems available to do the job, as with putative cases of causation by omission. In particular, I elaborate on Helen Beebee’s idea that not all causal explanations are reports of causation. When we mention John’s failure to turn off the gas as an explanans of why there was an explosion, we do not say what caused the explosion. We do not mention any of the relevant causes. We just remark that one sort of event that was supposed to occur, and whose occurrence would have prevented the explosion, did not in fact occur.

  81. 2006h, with Wolfgang-Reiner Mann: ‘Parts and Wholes: Foreword’, The Journal of Philosophy, 103:12 (2006), 593–596.

    Abstract. A brief introductory note to [2:2006], setting the background for the seven papers included in the rest of the issue (by K. Fine, H. Hudson, M. Johnston, K. Koslicki, C. Normore, P. M. Simons, and P. van Inwagen).

  82. 2006g, with Giuliano Torrengo: ‘Crimes and Punishments’, Philosophia, 34:4 (2006), 395–404.

    Abstract. Every criminal act ought to be matched by a corresponding punishment, or so we may suppose, and every punishment ought to reflect a criminal act. We know how to count punishments. But how do we count crimes? In particular, how does our notion of a criminal action depend on whether the prohibited action is an activity, an accomplishment, an achievement, or a state?

  83. 2006f: ‘The Talk I Was Supposed to Give’, in Andrea Bottani and Richard Davies (eds.), Modes of Existence: Papers in Ontology and Philosophical Logic , Frankfurt, Ontos Verlag, 2006, pp. 131–152.

    Abstract. Assuming that events form a genuine ontological category, shall we say that a good inventory of the world ought to include “negative” events—failures, omissions, things that didn’t happen—along with positive ones? I argue that we shouldn’t. Talk of non-occurring events is like talk of non-existing objects and should not be taken at face value. We often speak as though there were such things, but deep down we want our words to be interpreted in such a way as to avoid serious ontological commitment.

  84. 2006e: ‘Strict Identity with No Overlap’, Studia Logica, 82:3 (2006), 371–378.

    Abstract. It is common lore that standard, Kripke-style semantics for quantified modal logic is incompatible with the view that no individual may belong to more than one possible world, a view that seems to require a counterpart-theoretic semantics instead. Strictly speaking, however, this thought is wrong-headed. This note explains why.

  85. 2006d: ‘A Note on the Transitivity of Parthood’, Applied Ontology, 1:2 (2006), 141–146.

    Abstract. That parthood is a transitive relation is among the most basic principles of classical mereology. Alas, it is also very controversial. In a recent paper, Ingvar Johansson has put forward a novel diagnosis of the problem, along with a corresponding solution. The diagnosis is on the right track, I argue, but the solution is misleading. And once the pieces are properly put together, we end up with a reinforcement of the standard defense of transitivity on behalf of classical mereology.

  86. 2006c: ‘What Is to Be Done?’, Topoi, 25 (2006), 129–131.

    Abstract. If the question is: What is to be done for philosophy?, then it calls for a political answer and I have little to say besides the obvious. If the question is: What is to be done in philosophy?, then I’m stuck. Drawing up a list of to-do’s and not-to-do’s would not, I think, be a good way to honor the general conception of philosophy that inspired Topoi throughout these years, and that I deeply share.

  87. 2006b, with Andrea Borghini: ‘Event Location and Vagueness’, Philosophical Studies, 128:2 (2006), 313–336.

    Abstract. Most event-referring expressions are vague; it is utterly difficult, if not impossible, to specify the exact spatiotemporal location of an event from the words that we use to refer to it. We argue that in spite of certain prima facie obstacles, such vagueness can be given a purely semantic (broadly supervaluational) account.

  88. 2006a: ‘The Universe among Other Things’, Ratio, 19:1 (2006), 107–120.

    Abstract. Peter Simons has argued that the expression ‘the universe’ is not a genuine singular term: it can name neither a single, completely encompassing individual, nor a collection of individuals. (It is, rather, a semantically plural term standing equally for every existing object.) I offer reasons for resisting Simons’s arguments on both scores.

  89. 2005f: ‘The Vagueness of ‘Vague’: Rejoinder to Hull’, Mind, 114:455 (2005), 695–702.

    Abstract. A rejoinder to G. Hull’s reply to my [4:2003h]. Hull argues that Sorensen’s purported proof that ‘vague’ is vague—which I defended against certain familiar objections—fails. He offers three reasons: (i) the vagueness exhibited by Sorensen’s sorites is just the vagueness of ‘small’; (ii) the general assumption underlying the proof, to the effect that predicates which possess borderline cases are vague, is mistaken; (iii) the conclusion of the proof is unacceptable, for it is possible to create Sorensen-type sorites even for predicates that are paradigmatically precise. I argue that each of these points involves fallacious reasoning.

  90. 2005e: ‘Beth Too, but Only If’, Analysis, 65:3 (2005), 224–229.

    Abstract. On the difficulty of extracting the logical form of a seemingly simple sentence such as ‘If Andy went to the movie then Beth went too, but only if she found a taxi cab’, with some morals and questions on the nature of the difficulty.

  91. 2005d: ‘Change, Temporal Parts, and the Argument from Vagueness’, Dialectica, 59:4 (2005), 485–498.

    Abstract. The so-called “argument from vagueness”, the clearest formulation of which is to be found in Ted Sider’s book Four-dimensionalism, is arguably the most powerful and innovative argument recently offered in support of the view that objects are four-dimensional perdurants. The argument is defective—I submit—and in a number of ways that is worth looking into. But each “defect” corresponds to a model of change that is independently problematic and that can hardly be built into the common-sense picture of the world. So once all the gaps of the argument are filled in, the three-dimensionalist is left with the burden of a response that cannot rely on a passive plea for common sense. The argument is not a threat to common sense as such; it is a threat to the three-dimensionalist faithfulness to common sense.

  92. 2005c: ‘Time Travel: Foreword’, The Monist, 88:3 (2005), 325–328.

    Abstract. A brief introductory note to [2:2005], setting the background for the nine papers included in the rest of the issue (by D. Horacek, R. LePoidevin, S. Savitt, T. Sider, J. Simon, M. H. Slater, N. J. J. Smith, G. P. Stevenson, P. B. N. Vranas).

  93. 2005b: ‘Teoria e pratica dei confini’ [Boundaries: Theory and Practice], Sistemi Intelligenti, 17:3 (2005), 399–418.

    Abstract. Are there any bona fide boundaries, i.e., boundaries that carve at the joints? Or is any boundary—hence any object—the result of a fiat articulation reflecting our cognitive biases and our social practices and conventions? Does the choice between these two options amount to a choice between realism and wholesome relativism?

  94. 2005a, with Roberto Casati: ‘Esercizi di attenzione’ [Exercises in Attention], in Marco Belpoliti and Gianluigi Ricuperati (eds.), Saul Steinberg (Riga, n. 24), Milan, Marcos y Marcos, 2005, pp. 398–403.
    Abridged version reprinted as ‘Attenzione’ [Attention], in Marco Belpoliti (ed.), Steinberg A–Z, Milan, Electa, 2021, pp. 107–108.

    Abstract. A brief study of Saul Steinberg’s works on shadows and reflections, and of the seemingly paradoxical world that emerges from such works.

  95. 2004d: ‘Conjunction and Contradiction’, in Graham Priest, J. C. Beall, and Brad Armour-Garb (eds.), The Law of Non-Contradiction. New Philosophical Essays, Oxford, Oxford University Press, 2004, pp. 93–110.
    Italian translation by Francesco Berto: ‘Congiunzione e contraddizione’, in Francesco Altea and Francesco Berto (eds.), Scenari dell’impossibile. La contraddizione nel pensiero contemporaneo, Padua, Il Poligrafo, 2007, pp. 63–86.

    Abstract. There are two ways of understanding the notion of a contradiction: as a conjunction of a statement and its negation, or as a pair of statements one of which is the negation of the other. Correspondingly, there are two ways of understanding the Law of Non-Contradiction (LNC), i.e., the law that says that no contradictions can be true. In this paper I offer some arguments to the effect that on the first (collective) reading LNC is non-negotiable, but on the second (distributive) reading it is perfectly plausible to suppose that LNC may, in some rather special and perhaps undesirable circumstances, fail to hold.

  96. 2004c: ‘Identità indeterminate e indeterminatezza linguistica’ [Indeterminate Identities and Linguistic Indeterminacy], Rivista di estetica, 44:2 (2004), 285–302.

    Abstract. Some philosophers have gone a long way towards a clarification and a defense of the view that there is genuine (worldly) indeterminacy of identity. Among their reasons for taking this view seriously is the contention that extant formulations of the alternative conception, according to which all indeterminacy lies in the semantics of our language (or in the system of concepts embodied in our language), are not fitted for dealing with a host of identity puzzles. I this paper I take issue with that contention and argue that the semantic conception, if charitably construed, can meet such challenges.

  97. 2004b, with Elena Casetta: ‘RedPill®’, in Massimiliano Cappuccio (ed.), Dentro la matrice. Filosofia, scienza e spiritualità in Matrix, Milan, Alboversorio, 2004, pp. 29–35.
    Reprinted in Nazione Indiana (online publication), March 28, 2004.

    Abstract. The red pill or the blue pill? Obviously the red. But are we sure it will work the way it is supposed to? Are we sure it will take us out of the Matrix? We are proud to announce that we have found a document that will throw some new light (and a renewed cloud of suspicion) on this matter: the product packaging of RedPill®, complete with all directions for use and warnings against side-effects.

  98. 2004a, with Roberto Casati: ‘Counting the Holes’, Australasian Journal of Philosophy, 82:1 (2004), 23–27 (special issue on “The Philosophy of David Lewis”).
    Reprinted in Frank Jackson and Graham Priest (eds.), Lewisian Themes. The Philosophy of David K. Lewis, New York, Oxford University Press, 2004, pp. 24–28.

    Abstract. Argle claimed that holes supervene on their material hosts, and that every truth about holes boils down to a truth about perforated things. This may well be right, assuming holes are perforations. But we still need an explicit theory of holes to do justice to the ordinary way of counting holes—or so says Cargle.

  99. 2003k: ‘Naming the Stages’, Dialectica, 57:4 (2003), 387–412.

    Abstract. Standard lore has it that a proper name is a temporally rigid designator. It picks out the same entity at every time at which it picks out an entity at all. If the entity in question is an enduring continuant then we know what this means, though we are also stuck with a host of metaphysical puzzles concerning endurance itself. If the entity in question is a perdurant then the rigidity claim is trivial, though one is left wondering how it is that different speakers ever manage to pick out one and the same entity when a host of suitable, overlapping candidates are available. But what if the entity in question is neither a continuant nor a perdurant? What if the things we talk about in ordinary language are time-bound entities that cannot truly be said to persist through time, or stage sequences whose unity resides exclusively in our minds—like the “waves” at the stadium or the characters of a cartoon? In such cases the rigidity claim can’t be right and a counterpart-theoretic semantics seems required. Is that bad? I say it isn’t. And it had better not be, if that turns out to be the best metaphysical option we have.

  100. 2003j, with Maurizio Ferraris: ‘Che cosa c’è e che cos’è’ [What There Is and What It Is], in Noûs. Postille su pensieri, Lecce, Edizioni Milella, 2003, pp. 81–101.
    Reprinted in Rescogitans (online publication), October 2005.
    Reprinted with revisions in [1:2010].

    Abstract. A philosophical exchange broadly inspired by the characters of Berkeley’s Three Dialogues. Hylas is the realist philosopher: the view he stands up for reflects a robust metaphysic that is reassuringly close to common sense, grounded on the twofold persuasion that the world comes structured into entities of various kinds and at various levels and that it is the task of philosophy, if not of science generally, to “bring to light” that structure. Philonous, by contrast, is the anti-realist philosopher (though not necessarily an idealist): his metaphysic is stark, arid, dishearteningly bone-dry, and stems from the conviction that a great deal of the structure that we are used to attribute to the world out there lies, on closer inspection, in our head, in our “organizing practices”, in the complex system of concepts and categories that unrerlie our representation of experience and our need to represent it that way.

  101. 2003i, with Roberto Casati: ‘Sfondo e figura’ [Background and Figure], Rivista di estetica, 43:3 (2003), 38–40 (special issue in memory of Paolo Bozzi).
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).
    Polish translation by Patrycja Mikulska: ‘Tło i figura’, Filozofuj!, May 12, 2023.

    Abstract. A dialogue between a figure and its background, illustrating that the perceptual conditions that determine which is which are not as clear as standard Gestalt theory dictates.

  102. 2003h: ‘Higher-Order Vagueness and the Vagueness of ‘Vague’’, Mind, 112:446 (2003), 295–298.
    German translation by Sven Walter: ‘Höherstufige Vagheit und die Vagheit von ,vage’’, in Sven Walter (ed.), Vagheit, Paderborn, Mentis Verlag, 2005, pp. 147–150.

    Abstract. R. Sorensen’s argument to the effect that ’vague’ is a vague predicate has been used by D. Hyde to infer that vague predicates suffer from higher-order vagueness. M. Tye has objected (convincingly) that this is too strong: all that follows from Sorensen’s result is that there are some border border cases, but not necessarily border border cases of every vague predicate. I argue that this is still too strong: Sorensen’s proof presupposes the existence of border border cases, hence cannot be used to establish that fact on pain of circularity.

  103. 2003g: ‘Ontologia: dove comincia e dove finisce’ [Ontology: Where It Starts and Where It Ends], Sistemi intelligenti, 15:3 (2003), 493–506.

    Abstract. As Quine famously argued, the answer to the question: ‘What Is There’ is just: ‘Everything’. But to say ‘Everything’ is to say nothing. So we need to go further. This paper deals with the question of whether we can go any further in ontology without doing metaphysics proper.

  104. 2003f: ‘Perdurantism, Universalism, and Quantifiers’, Australasian Journal of Philosophy, 81:2 (2003), 208–215.

    Abstract. I argue that the conjunction of perdurantism (the view that objects are temporally extended) and universalism (the thesis that any old class of things has a mereological fusion) gives rise to undesired complications when combined with certain plausible assumptions concerning the semantics of tensed statements.

  105. 2003e: ‘Entia Successiva’, Rivista di estetica, 43:1 (2003), 139–158.

    Abstract. The theory according to which most ordinary objects are mere “entia successiva”—sequences of distinct mereological aggregates, whose unity resides exclusively in our minds—is a variant of the standard, three-dimensional conception of objects. For the aggregates are, at bottom, endurants, i.e., entities that persist through time by being fully present at any time at which they exist. In this paper I compare this theory with the so-called “stage view”, according to which ordinary objects—indeed, all objects—are sequences of momentary entities that cannot truly be said to persist through time. Both theories face a number of intuitive difficulties but the stage view, I argue, has a lot more to offer in return.

  106. 2003d, with Anthony G. Cohn: ‘Mereotopological Connection’, Journal of Philosophical Logic, 32:4 (2003), 357–390.

    Abstract. And extended and unified version of [4:1998a] and [4:1999e], this paper outlines a general framework for dealing with the variety of mereotopological theories that stem from alternative ways of construing the basic relation of topological connection.

  107. 2003c: ‘Cut-offs and their Neighbors’, in J. C. Beall (ed.) Liars and Heaps: New Essays on Paradox, Oxford, Oxford University Press, 2003, pp. 24–38.

    Abstract. In ‘Towards a Solution to the Sorites Paradox’, Graham Priest gives us a new account of the sorites based on fuzzy logic. The novelty lies in the suggestion that truth-value assignments should themselves be treated as fuzzy objects, i.e., objects about which we can make fuzzy identity statements. I argue that Priest’s solution does not have the explanatory force that Priest advocates. That is, it does not explain why we find the existence of a cut-off point counter-intuitive. I also argue that this sort of explanation calls for a general theory that goes beyond the special case of linguistic vagueness, for the phenomenon is at bottom not linguistic.

  108. 2003b, with Massimo Warglien: ‘The Geometry of Negation’, Journal of Applied Non-Classical Logics, 13:1 (2003), 9–19.

    Abstract. There are two natural ways of thinking about negation: (i) as a form of complementation and (ii) as an operation of reversal, or inversion (to deny that p is to say that things are “the other way around”). A variety of techniques exist to model conception (i), from Euler and Venn diagrams to Boolean algebras. Conception (ii), by contrast, has not been given comparable attention. In this note we outline a twofold geometric proposal, where the inversion metaphor is understoood as involving a rotation o a reflection, respectively. These two options are equivalent in classical two-valued logic but they differ significantly in many-valued logics. Here we show that they correspond to two basic sorts of negation operators—Post’s and Kleene’s—and we provide a simple group-theoretic argument demonstrating their generative power.

  109. 2003a: ‘Riferimento, predicazione, e cambiamento’ [Reference, Predication, and Change], in Claudia Bianchi and Andrea Bottani (eds.), Significato e ontologia, Milan, Franco Angeli, 2003, pp. 221–249.

    Abstract. This paper focuses on the semantics of statements of the form ‘x is P at t’ vis-à-vis its metaphysical underpinnings. I begin by considering four main readings, corresponding to the four basic parsings of the temporal modifier ‘at t’: (1) at-t x is P, (2) x-at-t is P, (3) x is-at-t P, and (4) x is P-at-t. Each of these readings—which correspond to different metaphysical conceptions of the nature of temporal change—is found inadequate or otherwise problematic. In the second part of the paper I therefore consider a fifth account whose advantages over (1)–(4), I argue, exceed its revisionary costs. This fifth account is based on a conception of objects as entia successiva held together by a nexus of temporal counterparthood and reads ‘x is P at t’ as ‘the t-counterpart of x is P’.

  110. 2002g: ‘Parti connesse e interi sconnessi’ [Connected Parts and Disconnected Wholes], Rivista di estetica, 42:2 (2002), 87–90.

    Abstract. The Doctrine of Potential Parts says that proper undetached parts are merely potential entities, entities that do not exist but would exist if they were detached from the rest. They are just aspects of the whole to which they belong, ways in which the whole could be broken down, and talk of such parts is really just talk about the modal properties of the whole. Here I offer a reconstruction of this doctrine and present an argument to illustrate its hidden kinship with another, parallel but independent doctrine Doctrine of Potential Wholes. According to this second doctrine, disconnected wholes (i.e., wholes that are not in one piece) are in turn potential entities, entities that do not exist but would exist if their parts were suitably conjoined.

  111. 2002f: ‘Events, Truth, and Indeterminacy’, The Dialogue, 2 (2002), 241–264.

    Abstract. The semantics of our event talk is a complex affair. What is it that we are talking about when we speak of Brutus’s stabbing of Caesar? Exactly where and when did it take place? Was it the same event as the killing of Caesar? Some take questions such as these to be metaphysical questions. I think they are questions of semantics—questions about the way we talk and about what we mean. And I think that this conflict between metaphysic and semantic concerns is indicative of a “deep indeterminacy” (Bennett’s phrase) in our event concept. We do talk about events; but what events a statement is about is not something that can be inferred from the event names we use; it depends heavily (more heavily than with ordinary material objects) on local context and unprincipled intuitions. This paper illustrates this view in connection with two examples: the phenomenon of vagueness and the dispute over identity statements.

  112. 2002e: ‘On Logical Relativity’, Philosophical Issues, 12 (2002), 197–219 (annual supplement to Noûs, volume on “Realism and Relativism”).
    Italian translation by Luca Morena: ‘Sulla relatività logica’, in Massimiliano Carrara and Pierdaniele Giaretta (eds.), Filosofia e logica, Cosenza, Rubbettino, 2004, pp. 135–173.

    Abstract. One logic or many? I say—many. Or rather, I say there is one logic for each way of specifying the class of all possible circumstances, or models, i.e., all ways of interpreting a given language. But because there is no unique way of doing this, I say there is no unique logic except in a relative sense. Indeed, given any two competing logical theories T1 and T2 (in the same language) one could always consider their common core, T, and settle on that theory. So, given any language L, one could settle on the minimal logic T0 corresponding to the common core shared by all competitors. That would be a way of resisting relativism, as long as one is willing to redraw the bounds of logic accordingly. However, such a minimal theory T0 may be empty if the syntax of L contains no special ingredients the interpretation of which is independent of the specification of the relevant L-models. And generally—I argue—this is indeed the case. (The argument expands on a point first made in [4:1995f].)

  113. 2002d, with Roberto Casati: ‘Un altro mondo?’ [A Different World?], Rivista di estetica, 42:1 (2002), 131–159.
    Reprinted with omissions as ‘Senso comune, apparenza e realtà’ [Common Sense, Appearance, and Reality], in Evandro Agazzi (ed.), Valori e limiti del senso comune, Milan, Franco Angeli, 2004, pp. 423–442.

    Abstract. Alexandre Koyré wrote that Newton and the science that followed led to a splitting of the world: on the one hand is the “world of qualities and of sensible perceptions”, on the other is the “world of quantities and of reified geometry”. A comparison between facts held true by common sense and false by the scientific image of the world (or vice versa) seems to confirm this view. But is the dichotomy a real one? Is the world of common sense really “another world” relative to the world of the natural sciences? In this paper we argue in support of a negative answer.

  114. 2002c, with Barry Smith: ‘Surrounding Space. On the Ontology of Organism-Environment Relations’, Theory in Biosciences, 120:2 (2002), 139–162.

    Abstract. The history of evolution is a history of development from less to more complex organisms. This growth in complexity of organisms goes hand in hand with a concurrent growth in complexity of environments and of organism-environment relations. It is a concern with this latter aspect of evolutionary development that motivates the present paper. We develop a formal theory of organism-environment relations and we show that the theory can be applied to a range of different sorts of cases, both biological and non-biological, in which objects are lodged or housed within specific environments or niches. Where biological science is interested in types (in regularities which can serve as the basis for the formulation of laws or general principles), the framework here presented draws on the idea that types (for example genotypes, phenotypes—and niche types) exist only through their corresponding tokens.

  115. 2002b: ‘Words and Objects’, in Andrea Bottani, Massimiliano Carrara, and Daniele Giaretta (eds.), Individuals, Essence, and Identity. Themes of Analytic Metaphysics, Dordrecht, Kluwer, 2002, pp. 49–75.

    Abstract. A lot of work in metaphysics relies on linguistic analysis and intuitions. Do we want to know what sort of things there are or could be? Then let’s see what sort of things there must be in order for what we truthfully say to be true. Do we want to see whether x is distinct from y? Then let’s see whether there is any statement that is true of x but not of y. And so on. In this paper I argue that this way of proceeding is full of traps and is bound to be pretty useless unless we already have a good idea of what sort of things there are, and of how we are going to count them.

  116. 2002a: ‘Ontologia e metafisica’ [Ontology and Metaphysics], in Franca D’Agostini and Nicla Vassallo (eds.), Storia della Filosofia Analitica, Turin, Einaudi, 2002, pp. 81–117.

    Abstract. A critical survey of topics that play a central role in contemporary analytic ontology and metaphysics, including, identity, persistence through time, the problem of universals, the notion of ontological commitment, and the boundary between semantic issues and metaphysics proper.

  117. 2001j: ‘The Best Question’, Journal of Philosophical Logic, 30:3 (2001), 251–258.
    Italian translation by Maurizio Dapor: ‘Una buona domanda?’, Atti dell’Accademia roveretana degli Agiati, Classe di Scienze matematiche, fisiche e naturali, IX, 4:B (2014), 5–13.

    Abstract. In ‘The Paradox of the Question’ Ned Markosian tells a tale in which philosophers have a chance to ask an angel a question of their choice. What should they ask to make the most of their unique opportunity? Ted Sider has suggested asking: What is the true proposition (or one of the true propositions) that would be most beneficial for us to be told? I think we can do much better than that.

  118. 2001i: ‘Parts, Counterparts, and Modal Occurrents’, Travaux de Logique, 14 (2001), 151–171.

    Abstract. The paper investigates the link between the theory of modal occurrents (where individuals are allowed to stretch across possible worlds) and Lewis’s counterpart theory (where all individuals are world-bound but have counterparts in other worlds). First I show how to interpret modal talk extensionally within the theory of modal occurrents. Then I show that the assumption that worlds be pairwise discrete is all that is needed to reconstruct the bulk of counterpart theory (i.e., to define the concept of a counterpart and to derive the standard postulates governing that concept) in terms of the theory of modal occurrents. Finally, I argue that this reconstruction allows us to view the indeterminacy of our modal intuitions as being part and parcel with the indeterminacy of our criteria for individuating modal occurrents, and that this indeterminacy is naturally explained in terms of linguistic (as opposed to ontic) vagueness.

  119. 2001h: ‘Doughnuts’, in Monima Chadha and Ajay K. Raina (eds.), Basic Objects: Case Studies in Theoretical Primitives, Shimla, Indian Institute of Advanced Study, 2001, pp. 41–51.
    Reprinted in Reports on Philosophy, 22 (2004), 49–59 (special issue in memory of Artur Rojszczak).
    Russian translation by Andrei Rodin: ‘Бублик вокруг Дырки’, Логос, 4 (2001), 192–197.

    Abstract. In classical topology the only part of a doughnut that matters is the edible part. Here I review some good reasons for reversing the order and focusing on the hole instead. By studying the topology of the hole one can learn interesting things about the morphology of the doughnut (its shape), and by studying the morphology of the hole in turn one can learn a lot about the doughnut’s dynamic properties (its patterns of interaction with the environment). The price—of course—is that one must be serious about reifying voids.

  120. 2001g: ‘Vagueness in Geography’, Philosophy & Geography, 4:1 (2001), 49–65.
    Italian version as ‘I confini del Cervino’ [The Boundaries of Mt. Cervino], in Vincenzo Fano, Gino Tarozzi, and Massimo Stanzione (eds.), Prospettive della logica e della filosofia della scienza. Atti del convegno triennale della Società Italiana di Logica e Filosofia delle Scienze, Cosenza, Rubbettino, 2001, pp. 431–445.

    Abstract. This paper is an extended version of [4:2000h], with special emphasis on the significance (and adequacy) of semantic treatments of vagueness in the geographic domain.

  121. 2001f, with Roberto Casati: ‘That Useless Time Machine’, Philosophy, 76:298 (2001), 581–583.
    Italian translation in [2:2004], ‘Di un progetto inutile’ (with further translations into French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    Reprinted in Paul J. Nahin, Time Machines Tales: The Science Fiction Adventures and Philosophical Puzzles of Time Travel, New York, Springer, 2017, pp. xxxvii–xxxix.

    Abstract. Dear “Time Machine” Research Group: if in order to travel to the past one has to have been there already, and if one can only do what has already been done, then why build a time machine in the first place? À quoi bon l’effort?

  122. 2001e: ‘Introduction: Philosophical Issues in Geography’, Topoi, 20:2 (2001), 119–130.

    Abstract. An outline of the wealth of philosophical material that hides behind the flat world of geographic maps, with special reference to (i) the centrality of the boundary concept, (ii) the problem of vagueness, and (iii) the metaphysical question (if such there be) of the identity and persistence conditions of geographic entities. Serves as an introduction to [2:2001].

  123. 2001d, with Massimiliano Carrara: ‘Ontological Commitment and Reconstructivism’, Erkenntnis, 55:1 (2001), 33–50.
    Extended abstract preprinted as ‘A Note on Ontological Reconstructivism’, in Third European Congress of Analytic Philosophy: Abstracts of Contributed Papers, special issue of ANaliza (1999), pp. 39–40.

    Abstract. Some forms of analytic reconstructivism take natural language (and common sense at large) to be ontologically misleading: ordinary sentences must be suitably rewritten or paraphrased before questions of ontological commitment may be raised. Other forms take the commitment of ordinary language at face value, but regard it as metaphysically misleading: common-sense objects exist, but they are not what we think they are. This paper is an attempt to clarify and critically assess some common limits of these two reconstructive strategies.

  124. 2001c: ‘Vagueness, Logic, and Ontology’, The Dialogue, 1 (2001), 135–154.
    Reprinted in Darragh Byrne and Max Kölbel (eds.), Arguing about Language, London, Routledge, 2010, pp. 507–519.

    Abstract. The paper reviews the link between logical and ontological aspects of vagueness and offers new arguments in favor of the view that all vagueness is de dicto (i.e., semantic or pragmatic) as opposed to de re (or ontological).

  125. 2001b, with Barry Smith: ‘Environmental Metaphysics’, in Uwe Meixner (ed.), Metaphysics in the Post-Metaphysical Age. Proceedings of the 22th International Wittgenstein Symposium, Vienna, Hölder-Pichler-Tempsky, 2001, pp. 231–239.
    Japanese translation by S. Kajitani: ‘環境の形而上学’, 理想, 669 (2002), 170–180.

    Abstract. We outline the beginnings of a general theory of environments, of the parts or regions of space in which organisms live and move. We draw on two sources: on the one hand on recent work on the ontology of space; on the other hand on work by ecological scientists on concepts such as territory, habitat and niche.

  126. 2001a: ‘L’autoriferimento si spiega da sé’ [Self-Reference Self-Explained], Rivista di Estetica, 41:3 (2001), 5–7.
    Reprinted with revisions as ‘I contesti del paradosso’, in Carlo Penco (ed.), La svolta contestuale, Milan, McGraw-Hill Italia, 2002, pp. 267–270.
    English version as ‘Self-Reference Self-Explained’, The Blue and White, 9:2 (2002), 50–51.
    ~ Reprinted in PhiNews, 6 (2004), 36–39.
    Also reprinted with revisions in [2:2004] (with further translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    ~ English version adapted into stage play by Natalie Glick as ‘Self-Reference Self-Explained’, Insurmountable Simplicities, All Gone Theatre Company, New York, 2010.

    Abstract. A dialogue among statements that try to explain to each other the mechanisms and peculiarities of self-referential assertions and, particularly, of their context-dependence.

  127. 2000k: ‘Mereological Commitments’, Dialectica, 54:4 (2000), 283–305.

    Abstract. We tend to talk about (refer to, quantify over) parts in the same way in which we talk about whole objects. Yet a part is not something to be included in an inventory of the world over and above the whole to which it belongs, and a whole is not something to be included in the inventory over and above its constituent parts. This paper is an attempt to clarify a way of dealing with this tension which may be labeled the Minimalist View: An element in the field of a part-whole relation is to be included in an inventory of the world if and only if it does not overlap any distinct element that is itself included in the inventory.

  128. 2000j, with John Collins: ‘Unsharpenable Vagueness’, Philosophical Topics, 28:1 (2000), 1–10.

    Abstract. A plausible thought about vagueness is that it involves semantic incompleteness. To say that a predicate is vague is to say (at the very least) that its extension is incompletely specified. Where there is incomplete specification of extension there is indeterminacy, an indeterminacy between various ways in which the specification of the predicate might be completed or sharpened. In this paper we show that this idea is bound to founder by presenting an argument to the effect that there are vague predicates which cannot be sharpened in such a way as to meet certain basic constraints (of penumbral connection and public accessibility) that must be imposed on the very notion of a sharpening.

  129. 2000i: ‘Temporal Parts: Foreword’, The Monist, 83:3 (2000), 319–320.

    Abstract. A brief introductory note to [2:2000b], setting the background for the eight papers included in the rest of the issue (by Y. Balashov, B. Brogaard, K. Fine, M. Heller, R. LePoidevin, J. Parsons, P. M. Simons, and P. van Inwagen).

  130. 2000h: ‘Vague Names for Sharp Objects’, in Leo Obrst and Inderjeet Mani (eds.), Proceedings of the KR Workshop on Semantic Approximation, Granularity, and Vagueness, Breckenridge (CO), AAAI Press, 2000, pp. 73–78.
    Extended abstract preprinted as ‘Are There Vague Boundaries?’, in Stephan Winter (ed.), Geographical Domain and Geographical Information Systems (GeoInfo 19), Vienna, Institite for Geoinformation, 2000, pp. 119–121.

    Abstract. Some philosophers have argued that the vagueness exhibited by names and descriptions such as ‘Mount Everest’, ‘Downtown Manhattan’, or ‘that cloud in the sky’ is ultimately ontological: they are vague because they refer to vague objects, objects with fuzzy boundaries. I take the opposite stand and argue for the view that all vagueness is semantic. There is no such thing as a vague mountain. Rather, there are many things where we conceive the mountain to be, each with its precise boundary, and when we say ‘Everest’ we are just being vague as to which thing we are referring to. This paper defends this view against some plausible objections.

  131. 2000g, with Philip Kitcher: ‘Some Pictures Are Worth 20 Sentences’, Philosophy, 75:293 (2000), 377–381.

    Abstract. According to the cliché a picture is worth a thousand words. But this is a canard, for it vastly underestimates the expressive power of many pictures and diagrams. In this note we show that even a simple map such as the outline of Manhattan Island, accompanied by a pointer marking North, implies a vast infinity of statements—including a vast infinity of true statements.

  132. 2000f: ‘Supervaluationism and Paraconsistency’, in Diderik Batens, Chris Mortensen, Graham Priest, and Jean Paul Van Bendegem (eds.), Frontiers in Paraconsistent Logic, Baldock, Research Studies Press, 2000, pp. 279–297.
    Extended abstract preprinted in Proceedings of the First World Congress on Paraconsistency, Gent, Universiteit Gent, 1997, pp. 157–160.

    Abstract. A much revised and extended version of [4:1995d], this paper examines a family of paraconsistent logics (logics in which inconsistent premises do not warrant arbitrary conclusions) which emerge from a corresponding variety of super/sub-valuational policies.

  133. 2000e, with Roberto Casati: ‘Topological Essentialism’, Philosophical Studies, 100:3 (2000), 217–236.

    Abstract. Considering topology as an extension of mereology, this paper analyses topological variants of mereological essentialism (the thesis that an object could not have different parts than the ones it has). In particular, we examine de dicto and de re versions of two theses: (i) that an object cannot change its external connections (e.g., adjacent objects cannot be separated), and (ii) that an object cannot change its topological genus (e.g., a doughnut cannot turn into a sphere). Stronger forms of structural essentialism, such as morphological essentialism (an object cannot change shape) and locative essentialism (an object cannot change position) are also examined.

  134. 2000d, with Barry Smith: ‘Fiat and Bona Fide Boundaries’, Philosophy and Phenomenological Research, 60:2 (2000), 401–420.

    Abstract. There is a basic distinction, in the realm of spatial boundaries, between bona fide boundaries on the one hand, and fiat boundaries on the other. The former are just the physical boundaries of old. The latter are exemplified especially by boundaries induced through human demarcation, for example in the geographic domain. The classical problems connected with the notions of adjacency, contact, separation and division can be resolved in an intuitive way by recognizing this two-sorted ontology of boundaries. Bona fide boundaries yield a notion of contact that is effectively modeled by classical topology; the analogue of contact involving fiat boundaries calls, however, for a different account, based on the intuition that fiat boundaries do not support the open/closed distinction on which classical topology is based. In the presence of this two-sorted ontology it then transpires that mereotopology—topology erected on a mereological basis—is more than a trivial formal variant of classical point-set topology. (This paper is a much revised and extended version of material previously presented in [4:1997d].)

  135. 2000c, with Fabio Pianesi: ‘Events and Event Talk: An Introduction’, in James Higginbotham, Fabio Pianesi, and Achille C. Varzi (eds.), Speaking of Events, New York, Oxford University Press, 2000, pp. 3–47.

    Abstract. A critical review of the main themes arising out of recent literature on the semantics of ordinary event talk. The material is organized in four sections: (i) the nature of events, with emphasis on the opposition between events as particulars and events as universals; (ii) identity and indeterminacy, with emphasis on the unifier/multiplier controversy; (iii) events and logical form, with emphasis on Davidson’s treatment of the form of action sentences; (iv) linguistic applications, with emphasis on issues concerning aspectual phenomena, the telicity/atelicity distinction, the treatment of statives, and temporal quantification. Serves as an introduction to [2:2000a].

  136. 2000b, with Roberto Casati: ‘All the Things You Are’, in Gabriele Usberti (ed.), Modi dell’oggettività, Milan, Bompiani, 2000, pp. 77–85.

    Abstract. An imaginary dialogue between Andrea Bonomi and Gonzalo Pirobutirro (the main character of Gadda’s novel La cognizione del dolore) aiming to challenge Bonomi’s tenet that a work of fiction defines a domain of objects which is closed with respect to the actual world.

  137. 2000a, with Roberto Casati: ‘True and False: An Exchange’, in Anil Gupta and André Chapuis (eds.), Circularity, Definition, and Truth, New Delhi, Indian Council of Philosophical Research, 2000, pp. 365–370.

    Abstract. Classically, truth and falsehood are opposite, and so are logical truth and logical falsehood. In this paper we imagine a situation in which the opposition is so pervasive in the language we use as to threaten the very possibility of telling truth from falsehood. The example exploits a suggestion of Ramsey’s to the effect that negation can be expressed simply by writing the negated sentence upside down. The difference between ‘p’ and ‘~~p’ disappears, the principle of double negation becomes trivial, and the truth/falsehood opposition is up for grabs. Our moral is that this indeterminacy undermines the idea of inferential role semantics.

  138. 1999h, with Barry Smith: ‘The Niche’, Noûs, 33:2 (1999), 214–238.
    Polish translation by Anna Redlin: ‘Nisza’, Filozofia Nauki, 8:3–4 (2000), 5–30.
    Extended abstract preprinted as ‘Mereology, Topology, Ecology: A Formal Theory of Organism-Niche Relations’, in Jacek Cachro and Katarzyna Kijania-Placek (eds.), 11th International Congress of Logic, Methodology and Philosophy of Science. Volume of Abstracts, Cracow, Jagiellonian University, 1999, p. 351.

    Abstract. The concept of niche (environment, setting, habitat) has been little studied by ontologists, in spite of its wide application in a variety of disciplines, from evolutionary biology to economics. This paper outlines a first formal theory of this concept, a theory of the relational ties between objects and their niches. The theory builds upon existing work on mereology, topology, and the theory of spatial location as tools of formal ontology. It is illustrated above all by means of simple biological examples, but the concept of niche should be understood as being, like concepts such as part, boundary, and location, a formal concept, one that is applicable in principle to a wide range of different domains.

  139. 1999g, with Lucia Tovena: ‘Events and Negative Descriptions’ (Abstract), in Sinn und Bedeutung 1999. Fourth Annual Conference of the Gesellschaft für Semantik, Düsseldorf, Heinrich-Heine Universität, 1999, pp. 71–73.

    Abstract. We argue against the idea that the semantic analysis of such sentences as ‘Mary saw John not jump’, ‘John often hasn’t paid taxes’, or ‘John kept the child awake by not turning out the light’ calls for an ontology of negative events, i.e., events which did not occur. When we talk about things that happened (just as when we talk about objects) we may help ourselves with all sorts of descriptive means. In some cases privative or negative descriptions may work best (‘John saw Mary not leave’, ‘Bill met a non-linguist’). In other cases, a positive description may be more appropriate (‘John saw Mary stay’, ‘Bill met a singer’). But the use of different descriptions need not imply that we are talking about different (types of) events or objects, just as the use of, say, psychological rathern than physicalistic descriptions does not imply an ontological distinction between mental and physical events or phenomena.

  140. 1999f: ‘Le strutture dell’ordinario’ [The Structures of the Ordinary], in Luigi Lombardi Vallauri (ed.), Logos dell’essere, logos della norma, Bari, Adriatica, 1999, pp. 489–530.

    Abstract. The general hypothesis underlying this work is that mereology (the study of the relations between an entity and its parts) and topology (understood as the study of the qualitative relations of connection and compactness) may jointly constitute adequate grounds for the formal-ontological analysis of the world of ordinary experience. The analysis focuses on certain minimal (structural) principles on the basis of which different philosophical theories may be erected.

  141. 1999e, with Anthony G. Cohn: ‘Modes of Connection’, in Christian Freksa and David M. Mark (eds.), Spatial Information Theory. Cognitive and Computational Foundations of Geographic Information Science, Berlin, Springer, 1999, pp. 299–314.

    Abstract. There has been a proliferation of theories for representing space and time in a qualitative way based on a primitive notion of topological connection. In previous work [4:1998a], we have commenced the construction of a unified framework. Independently of any foundational or applicative concerns, we attempt to delineate the space of mereotopological theories based on an account of their intended models and to place some existing theories into this framework. This paper extends this work by considering a second, orthogonal dimension along which varieties of topological connection can be classified: the strength of the connection.

  142. 1999d, with Barry Smith: ‘The Formal Structure of Ecological Contexts’, in Paolo Bouquet, Patrick Brezillon, Francesca Castellani, and Luciano Serafini (eds.), Modeling and Using Context. Proceedings of the Second International and Interdisciplinary Conference, Berlin, Springer, 1999, pp. 339–350.

    Abstract. This is an informal presentation of the theory of niches [4:1999h] understood as ecological contexts. The first part sets out the basic conceptual background. The second part outlines the main principles of the theory and addresses the question of how the theory can be extended to aid our thinking in relation to the special types of causal integrity that characterize niches and niched entities. A technical appendix shows how reference to the theory of holes [1:1994; 4:1996b] can simplify the mereotopological account of niches presented in [4:1999h].

  143. 1999c, with Fabio Pianesi: ‘The Context-Dependency of Temporal Reference in Event Semantics’, in Paolo Bouquet, Patrick Brezillon, Francesca Castellani, and Luciano Serafini (eds.), Modeling and Using Context. Proceedings of the Second International and Interdisciplinary Conference, Berlin, Springer, 1999, pp. 507–510.

    Abstract. Temporal reference in natural language is inherently context dependent: what counts as a moment in one context may be structurally analysed in another context, and vice versa. In this note we show how the apparatus developed in [4:1996f] allows one to account for this phenomenon within the framework of event-based semantics.

  144. 1999b: ‘Introduction’, in Achille C. Varzi (ed.), The Nature of Logic, Stanford, CSLI Publications, 1999, pp. 1–3.

    Abstract. A brief introductory note to [2:1999a], highlighting the need for of serious philosophical reflection on logic.

  145. 1999a, with Roberto Casati: ‘I trabocchetti della rappresentazione spaziale’ [The Pitfalls of Spatial Representation], Sistemi Intelligenti, 11:1 (1999), 7–28.

    Abstract. This is a position article summarizing our approach to the philosophy of space and spatial representation. Our concern is mostly methodological: above all, we argue that a number of philosophical puzzles that arise in this field—puzzles concerning the nature of spatial entities, their material and mereological constitution, their relationship with the space that they occupy—stem from a confusion between semantic issues and true metaphysical concerns.

  146. 1998d, with Francesco Orilia: ‘A Note on Analysis and Circular Definitions’, Grazer philosophische Studien, 54 (1998), 107–115.
    Italian version as ‘Analisi e definizioni circolari’, in Michele Di Francesco, Diego Marconi, and Paolo Parrini (eds.), Filosofia analitica 1996–1998. Prospettive teoriche e revisioni storiografiche, Milan, Guerini e Associati, 1998, pp. 146–150.
    Extended abstract preprinted as ‘Analysis, Substitution, and Circular Definitions’, in Filosofia e analisi filosofica. Prospettive teoriche e revisioni storiografiche (Convegno Nazionale della Società Italiana di Filosofia Analitica), Milan, Guerini e Associati, 1996, pp. 120–122.

    Abstract. On a rather popular conception, the paradox of analysis suggests that the intersubstitutivity of analysans and analysandum should be restricted to non-psychological contexts. This is typically taken to be compatible with the idea that two sentences differing only in that one has the analysandum where the other has the analysans express exactly the same proposition. In this note we argue that this should be pondered upon in light of the view that many important ordinary concepts are circular. In particular, we submit that if there are correct analyses grounding circular definitions, then we are bound to further restrict the substitutivity principle, for we must admit that it might fail even in non-psychological contexts.

  147. 1998c: ‘Basic Problems of Mereotopology’, in Nicola Guarino (ed.), Formal Ontology in Information Systems, Amsterdam, IOS Press, 1998, pp. 29–38.

    Abstract. Mereotopology is today regarded as a major tool for ontological analysis, and for many good reasons. There are, however, a number of open questions that call for an answer. Some are philosophical, others have direct import for applications, but all are crucial for a proper assessment of the strengths and limits of mereotopology. This paper is an attempt to put some order in this still untamed area of research.

  148. 1998b, with Roberto Casati and Barry Smith: ‘Ontological Tools for Geographic Representation’, in Nicola Guarino (ed.), Formal Ontology in Information Systems, Amsterdam, IOS Press, 1998, pp. 77–85.
    Japanese translation by Yumi Yamashita: ‘地理的表象のための存在論的ツール’, InterCommunication, 45 (2003), 80–91.

    Abstract. This paper is concerned with certain ontological issues in the foundations of geographic representation. It sets out what these basic issues are, describes the tools needed to deal with them, and draws some implications for a general theory of spatial representation. Our approach has ramifications in the domains of mereology, topology, and the theory of location, and the question of the interaction of these three domains within a unified spatial representation theory is addressed. In the final part we also consider the idea of non-standard geographies, which may be associated with geography under a classical conception in the same sense in which non-standard logics are associated with classical logic.

  149. 1998a, with Anthony G. Cohn: ‘Connection Relations in Mereotopology’, in Henri Prade (ed.), Proceedings of the 13th European Conference on Artificial Intelligence (ECAI 98), Chichester, John Wiley & Sons, 1998, 150–154.

    Abstract. We provide a model-theoretic framework for investigating and comparing a variety of mereotopological theories with respect to (i) the intended interpretation of their connection primitives, and (ii) the composition of their intended domains (e.g., whether or not they allow for boundary elements).

  150. 1997d, with Barry Smith: ‘Fiat and Bona Fide Boundaries. Towards an Ontology of Spatially Extended Objects’, in Stephen C. Hirtle and Andrew U. Frank (eds.), Spatial Information Theory: A Theoretical Basis for GIS. Proceedings of the Third International Conference, Berlin, Springer, 1997, pp. 103–119.
    Earlier version preprinted as ‘The Formal Ontology of Boundaries’, The Electronic Journal of Analytic Philosophy, 5 (online publication), 1997.
    ~ Russian translation by Alexey Shukhov: ‘Онтология границ’, Общество философских исследований и разработок (online publication), 2001.

    Abstract. Human cognitive acts are directed towards objects extended in space of a wide range of different types. This paper outlines a new proposal for bringing order into this typological clutter. The theory of spatially extended objects should make room not only for the objects of physics but also for objects at higher levels, including the objects of geography and of related disciplines. It should leave room for different types of boundaries, including both the bona fide boundaries which we find in the physical world and the fiat (or human-demarcation-induced) boundaries with which much of geography has to deal. Two distinct axiomatic theories of boundaries are accordingly presented, and the need for both is examined in some detail. The resultant dual framework is shown to have application above all for our understanding of issues involving contact, division, and separation, issues which have posed serious difficulties for the ontological theories of boundaries that have been proposed hitherto.

  151. 1997c: ‘Boundaries, Continuity, and Contact’, Noûs, 31:1 (1997), 26–58.
    Reprinted in Patrick Grim, Kenneth Baynes, and Gary Mar (eds.), The Philosopher’s Annual, Volume 20, Atascadero (CA), Ridgeview, 1999, pp. 225–258.
    Earlier version preprinted in Pascal Amsili, Mario Borillo, and Laure Vieu (eds.), Time, Space and Movement: Meaning and Knowledge in the Sensible World (Proceedings of the 5th International Workshop), Toulouse, COREP, 1995, Part D, pp. 79–100.

    Abstract. There are conflicting intuitions concerning the status of a boundary separating two adjacent entities (or two parts of the same entity). The boundary cannot belong to both things, for adjacency excludes overlap; and it cannot belong to neither, for nothing lies between two adjacent things. Yet how can the dilemma be avoided without assigning the boundary to one thing or the other at random? Some philosophers regard this as a reductio of the very notion of a boundary, which should accordingly be treated a mere façon de parler. In this paper I resist this temptation and examine some ways of taking the puzzle at face value within a realist perspective—treating boundaries as ontologically on a par with (albeit parasitic upon) extended parts.

  152. 1997b: ‘Inconsistency Without Contradiction’, Notre Dame Journal of Formal Logic, 38:4 (1997), 621–638.

    Abstract. David Lewis has argued that impossible worlds are nonsense: if there were such worlds, one would have to distinguish between the truths about their contradictory goings-on and contradictory falsehoods about them; and this—Lewis argues—is preposterous. In this paper I examine a way of resisting this argument by giving up the assumption that ‘in so-and-so world’ is a restricting modifier which passes through the truth-functional connectives The outcome is a sort of subvaluational semantics which makes a contradiction ‘A & ~A’ false even when both ‘A’ and ‘~A’ are true, just as supervaluational semantics makes a tautology ‘A v ~A’ true even when neither ‘A’ nor ‘~A’ are. Connections with discussive logics and complications of the account are discussed, and some general morals are drawn.

  153. 1997a, with Roberto Casati: ‘Spatial Entities’, in Oliviero Stock (ed.), Spatial and Temporal Reasoning, Dordrecht, Kluwer, 1997, pp. 73–96.

    Abstract. Ordinary reasoning about space—we argue—is first and foremost reasoning about things or events located in space. Accordingly, any theory concerned with the construction of a general model of our spatial competence must be grounded on a general account of the sort of entities that may enter into the scope of the theory. Moreover, on the methodological side the emphasis on spatial entities (as opposed to purely geometrical items such as points or regions) calls for a reexamination of the conceptual categories required for this task. Building on material previously presented in [4:1995b], in this work we offer some examples of what this amounts to, of the difficulties involved, and of the main directions along which spatial theories should be developed so as to combine formal sophistication with some affinity with common sense.

  154. 1996f, with Fabio Pianesi: ‘Refining Temporal Reference in Event Structures’, Notre Dame Journal of Formal Logic, 37:1 (1996), 71–83.
    Earlier version preprinted in Pascal Amsili, Mario Borillo, and Laure Vieu (eds.), Time, Space and Movement: Meaning and Knowledge in the Sensible World (Proceedings of the 5th International Workshop), Toulouse, COREP, 1995, Part D, pp. 17–27.

    Abstract. This work expands on the theory of events put forward in [4:1994d, 4:1994e, 4:1996e] by further investigating the subtle connections between time and events. Specifically, in the first part we generalize the notion of an event structure to that of a refinement structure, where various degrees of temporal granularity are accommodated. In the second part we investigate how these structures can account for the context-dependence of temporal structures in natural language.

  155. 1996e, with Fabio Pianesi: ‘Events, Topology, and Temporal Relations’, The Monist, 78:1 (1996), 89–116.

    Abstract. This paper expands on the theory of events put forward in [4:1994d, 4:1994e]. In the first part we consider some difficulties that arise as we move from the analysis of spatio-temporal regions to that of their natural occupants, such as physical bodies or events. In the second part we focus on the latter and we give a refined formulation of our argument to the effect that the temporal dimension can be directly construed from a domain of events in terms of the basic mereotopological relations of parthood and boundary.

  156. 1996d, with Roberto Casati: ‘The Structure of Spatial Localization’, Philosophical Studies, 82:2 (1996), 205–239.

    Abstract. What are the relationships between an entity and the space at which it is located? And between a region of space and the events that take place there? What is the metaphysical structure of localization? What its modal status? This paper addresses some of these questions in an attempt to work out at least the main coordinates of the logical structure of localization. Our task is mostly taxonomic. But we also highlight some of the underlying structural features and we single out the interactions between the notion of localization and nearby notions, such as the notions of part and whole, or of necessity and possibility. A theory of localization—we argue—is needed in order to account for the basic relations between objects and space, and runs afoul a pure part-whole theory. We also provide an axiomatization of the relation of localization and examine cases of localization involving entities different from material objects.

  157. 1996c: ‘Parts, Wholes, and Part-Whole Relations: The Prospects of Mereotopology’, Data and Knowledge Engineering, 20:3 (1996), 259–286.

    Abstract. We can see mereology as a theory of parthood and topology as a theory of wholeness. How can these be combined to obtain a unified theory of parts and wholes? This paper examines various non-equivalent ways of pursuing this task, with specific reference to its relevance to spatio-temporal reasoning. In particular, three main strategies are compared: (i) mereology and topology as two independent (though mutually related) chapters; (ii) mereology as a general theory subsuming topology; (iii) topology as a general theory subsuming mereology. Some more speculative strategies and directions for further research are also considered.

  158. 1996b: ‘Reasoning about Space: The Hole Story’, Logic and Logical Philosophy, 4 (1996), 3–39.

    Abstract. This is a revised and extended version of the formal theory of holes outlined in [4:1993c]. The first part summarizes the basic framework (ontology, mereology, topology, morphology). The second part emphasizes its relevance to spatial reasoning and to the semantics of spatial prepositions in natural language. In particular, I discuss the semantics of ‘in’ and provide an account of such fallacious arguments as “There is a hole in the sheet. The sheet is in the drawer. Ergo *there is a hole in the drawer”.

  159. 1996a, with Roberto Casati: ‘Introduction’, in Roberto Casati and Achille C. Varzi (eds.), Events, Aldershot, Dartmouth, 1996, pp. xi–xxxviii.

    Abstract. A critical survey of event theories, organized into five sections: (i) the role of events in the logical analysis of natural language; (ii) the metaphysical status of events; (iii) their identity and individuation criteria; (iv) their role in the analysis of space, time and causality; and (v) the distinction and classification of various types of events and event-like entities (such as processes and states). Serves as an introduction to [2:1996].

  160. 1995f: ‘Model-Theoretic Conventionalism’, in James Hill and Petr Kotátko (eds.), Karlovy Vary Studies in Reference and Meaning, Prague, Filosofia, 1995, pp. 406–430.

    Abstract. Model-theoretic conventionalism is the view that logic (any logic) is neither more nor less than a theory in the model-theoretic sense: it is specified by a certain set of theses expressed in a distinguished language, and these theses in turn are specified by singling out the intended interpretation of certain distinguished terms or operations available in the language (those terms and operations that are regarded as primitives of the theory). Building on the results of [4:1993d, 4:1995c], this paper attempts a full characterization of this view and scrutinizes some basic facts and arguments supporting it as well as some consequences arising from it.

  161. 1995e: ‘Vagueness, Indiscernibility, and Pragmatics: Comments on Burns’, The Southern Journal of Philosophy, 33 Suppl. (1995), 49–62.

    Abstract. In ‘Something to Do with Vagueness ...’, Linda Burns defends an analogy between the informational and the borderline-case variety of vagueness. She argues that the latter is in fact less extraordinary and less disastrous than people in the tradition of Michael Dummett and Crispin Wright have told us. However, her account involves presuppositions that cannot be taken for granted. Here we take a closer look at some of these presuppositions and argue that they may—when left unguarded—undermine much of Burns’ general account.

  162. 1995d: ‘Super-Duper Supervaluationism’, in Timothy Childers and Ondrej Majer (eds.), Logica ’94. Proceedings of the 8th International Symposium, Prague, Filosofia, 1995, pp. 17–40.

    Abstract. Since its first appearance in 1966, the notion of a supervaluation has been regarded by many as a powerful tool for dealing with semantic gaps. Only recently, however, applications to semantic gluts have also been considered. In previous work [4:1991, 4:1994a] I proposed a general framework exploiting the intrinsic gap/glut duality. Here I also examine an alternative account where gaps and gluts are treated on a par: although they reflect opposite situations, the semantic upshot is the same in both cases—the value of some expressions is not uniquely defined. Other strategies for generalizing supervaluations are considered and some comparative facts are discussed.

  163. 1995c: ‘Variable-Binders as Functors’, in Jan Wolenski and Vito F. Sinisi (eds.), The Heritage of Kazimierz Ajdukiewicz, Amsterdam, Rodopi, 1995, 303–319.

    Abstract. This work gives an extended presentation of the treatment of variable-binding operators adumbrated in [4:1993d]. Illustrative examples include elementary languages with quantifiers and lambda-equipped categorial languages. Some remarks are also offered to illustrate the philosophical import of the resulting picture. Particularly, a certain conception of logic emerges from the account: the view that logics are true theories in the model-theoretic sense, i.e. the result of selecting a certain class of models as the only “admissible” interpretation structures (for a given language).

  164. 1995b, with Roberto Casati: ‘Basic Issues in Spatial Representation’, in Michel De Glas and Zdzislaw Pawlak (eds.), Proceedings of the 2nd World Conference on the Fundamentals of Artificial Intelligence, Paris, Angkor, 1995, pp. 63–72.
    Reprinted in Carlo Penco and Giovanni Sarbia (eds.), Alle Origini della Filosofia Analitica. Atti del Convegno Nazionale della Società Italiana di Filosofia Analitica, Genoa, Erga Edizioni (CD Rom edition), 1995.

    Abstract. This is a preliminary report of part of a long term project on the foundations of spatial representation. In prospective, our aim is to unfold a general framework where the major results and open problems in this field can be set up and approached in a uniform fashion. Here, our concern is mainly with (i) analysing some basic notions that can be (or have been) used as primitives for this purpose (geometric points, places, regions, and bodies in the first place), and (ii) assessing the degree and significance in which the choice of any of such primitives may condition the resulting representation system.

  165. 1995a, with Piero Bonatti: ‘On the Meaning of Complementary Systems’ (Abstract), in Elia Castagli and Martin Konig (eds.), 10th International Congress of Logic, Methodology and Philosophy of Science. Volume of Abstracts, Florence, International Union of History and Philosophy of Science, 1995, p. 122.

    Abstract. Two proof systems are complementary iff what can be derived in one system is precisely that which cannot be derived in the other. We argue that the study of such systems—of which we provide a novel, Gentzen-style exemplification for classical logic—presents several points of interest both philosophically and metamathematically. We also draw connections with computer science, arguing that systems of this sort have important bearing on the semantics of programming languages and the logical characterization of complexity classes.

  166. 1994f: ‘On the Boundary Between Mereology and Topology’, in Roberto Casati, Barry Smith, and Graham White (eds.), Philosophy and the Cognitive Sciences. Proceedings of the 16th International Wittgenstein Symposium, Vienna, Hölder-Pichler-Tempsky, 1994, pp. 423–442.

    Abstract. Much recent work aimed at providing a formal ontological analysis of the “common-sense” world has emphasized the need for a mereological prospect to be supplemented with topological concepts and principles. How exactly these two frameworks are related, however, and how the underlying principles should interact with one another, is a rather unexplored issue. This paper provides a first assessment of some alternative routes, discussing their relative merits and examining to what extent their adequacy, and more generally the boundary between mereology and topology, depends on the ontological fauna that one is willing to countenance.

  167. 1994e, with Fabio Pianesi: ‘The Mereo-Topology of Event Structures’, in Paul Dekker and Martin Stokhof (eds.), Proceedings of the 9th Amsterdam Colloquium, Amsterdam, Institute for Logic, Language and Computation, 1994, pp. 527–546.

    Abstract. We hold that combining a mereological approach with a topological perspective provides a resourceful framework for the formal-ontological analysis of natural language semantics. In this spirit we present a general setting—using as primitives the relation of parthood and the notion of a boundary—which is meant to apply uniformly to as diverse domains as space, time, and the common-sense world. In particular, we focus on event-related phenomena and show how the temporal dimension can be reconstructed from the basic primitives. Illustrative examples include a discussion of some facts about present tense sentences and a tentative characterization of Aktionsarten-aspectual phenomena.

  168. 1994d, with Fabio Pianesi: ‘Mereo-Topological Construction of Time from Events’, Anthony G. Cohn (ed.), Proceedings of the 11th European Conference on Artificial Intelligence (ECAI 94), Chichester, John Wiley & Sons, 1994, pp. 396–400.
    Reprinted with revisions in Carola Eschenbach, Christopher Habel, and Barry Smith (eds.), Topological Foundations of Cognitive Science. Papers from the Workshop at the First International Summer Institute in Cognitive Science in Buffalo, Hamburg, GrKK, 1994, pp. 151–171.

    Abstract. We are used to regarding actions and other events, such as Brutus’ stabbing of Caesar or the sinking of the Titanic, as occupying intervals of some underlying linearly ordered temporal structure. This attitude is so natural and compelling that one may be tempted to reduce actual happenings to mere intervals cum description. On the other hand, if individual events are countenanced in the first place, then temporal relations may arguably be construed out of them. The main argument of this paper is that this relationist perspective can be accomplished by reasoning exclusively in terms of the basic mereotopological relations of parthood and boundary. More precisely, it is argued that the connection between the way events are perceived to be ordered and the underlying time dimension is essentially that of a construction of a linear ordering from the part-whole structure of a connected domain of events

  169. 1994c, with Roberto Casati: ‘Sulla rappresentazione dello spazio’ [On Space Representation], AI*IA Notizie, 7:3 (1994), 18–21
    Reprinted with revisions as ‘Perché i buchi sono importanti. Problemi di rappresentazione spaziale’ [Why Holes Are Important. Issues in Spatial Representation], Sapere, 63:2 (1997), 38–43.

    Abstract. The methodological anarchy that characterizes much recent research in artificial intelligence and other cognitive sciences has brought into existence (sometimes resumed) a large variety of entities from a correspondingly large variety of (sometimes dubious) ontological categories. Recent work in spatial representation and reasoning is particularly indicative of this trend. Our aim in this paper is to suggest some ways of reconciling such a luxurious proliferation of entities with the sheer sobriety of good philosophy.

  170. 1994b: ‘Things All of a Piece’, in Marco Somalvico (ed.), IV Convegno dell’Associazione Italiana per l’Intelligenza Artificiale: Atti del gruppo di lavoro “Aspetti epistemologici e gnoseologici dell’Intelligenza Artificiale”, Parma, Università degli Studi di Parma, 1994, pp. 55–58.

    Abstract. What is it that makes it possible to distinguish things and events that are all of a piece, such as a cup or a whistle, from scattered entities made up of several disconnected parts, such as a broken cup, a soccer tournament, or Brutus’ repeated stabbing of Caesar? The purpose of this note is to indicate a way of characterizing this issue, both as a matter of formal ontology and in accordance with some basic guidelines of knowledge representation.

  171. 1994a: ‘Supervaluational Policies for Epistemic Semantics’, in Marco Somalvico (ed.), IV Convegno dell’Associazione Italiana per l’Intelligenza Artificiale: Atti del gruppo di lavoro “Aspetti epistemologici e gnoseologici dell’Intelligenza Artificiale”, Parma, Università degli Studi di Parma, 1994, pp. 51–54.

    Abstract. This paper reviews some main strategies for extending the use of supervaluational techniques in the context of epistemic semantics. The final part examines connections with modal logics and suggestions for further generalizations.

  172. 1993d: ‘Do We Need Functional Abstraction?’, in Johannes Czermak (ed.), Philosophy of Mathematics. Proceedings of the 15th International Wittgenstein Symposium, Part 1, Vienna, Hölder-Pichler-Tempsky, 1993, pp. 407–415.

    Abstract. There is a widespread view according to which functional application is too poor a paradigm for the analysis of complex linguistic structures: we also need functional abstraction. For instance, variable-binding operators such as quantifiers, integrals, and the like seem to run afoul of the functor/argument scheme, though they can be accounted for easily with the help of functional abstracts. In this paper I argue against that view by presenting a way of interpreting functional abstraction within the framework of a pure categorial language, where the only relevant distinction is of the functor/argument type.

  173. 1993c: ‘Spatial Reasoning in a Holey World’, in Pietro Torasso (ed.), Advances in Artificial Intelligence. Proceedings of the 3rd Congress of the Italian Association for Artificial Intelligence, Berlin, Springer, 1993, pp. 326–336.
    Abridged version: ‘Spatial Reasoning in a Holey World: A Sketch’, in Frank Anger, Hans Guesgen, and Johan van Benthem (eds.), 13th International Joint Conference on Artificial Intelligence. Proceedings of the Workshop on Spatial and Temporal Reasoning, Chambéry, IJCAI, 1993, pp. 47–59.
    ~ Reprinted in Nicole Bidoit (ed.), Informatique Fondamentale et Intelligence Artificielle. Actes des Vèmes Journées du LIPN, Villetaneuse, Université de Paris Nord, Institut Galilée, 1993, pp. 53–65.

    Abstract. Much of our common-sense reasoning about space involves reasoning about holes and holed objects. We put things in holes, or through holes, or around them; we jump over a hole or fall into one; we compare holes, measure them, enlarge them or fill them up. A basic formalism for dealing with such forms of reasoning has been introduced in previous work [1:1994, 4:1993b]. The purpose of this paper is to illustrate how that formalism can be exploited to provide a framework for more general patterns of qualitative spatial reasoning.

  174. 1993b, with Roberto Casati: ‘An Ontology for Superficial Entities I: Holes’, in Nicola Guarino and Roberto Poli (eds.), International Workshop on Formal Ontology in Conceptual Analysis and Knowledge Representation, Padua, Ladseb-CNR, 1993, pp. 127–148.

    Abstract. A presentation (including some novel developments) of the formal theory of holes adumbrated in the appendix of our book [1:1994]. Several domains come to interact: ontology (holes are parasitic entities), mereology (holes may bear part-whole relations to one another); topology (holes are one-piece things located at the surfaces of their hosts); morphology (holes are fillable).

  175. 1993a: ‘Elaborazione e interrogazione degli atti visitali: qualche spunto metodologico’ [Processing and Querying a Visitation Document: Methodological Remarks], in Cecilia Nubola and Angelo Turchini (eds.), Visite pastorali ed elaborazione dei dati. Esperienze e metodi, Bologna, Il Mulino, 1993, pp. 309–319.

    Abstract. The documents of pastoral visitations constitute a very rich source of historical information. However, their systematic analysis involves various problems which in some cases appear to undermine the foundations of the historiographic method. This paper examines some of these problems with an eye on their epistemological aspects, also from the perspective of recent developments in the field of information retrieval and natural language processing.

  176. 1992: ‘Complementary Logics for Classical Propositional Languages’, Kriterion, 4 (1992), 20–24.

    Abstract. In [4:1990b] I introduced a complete axiomatization of classical non-tautologies based essentially on Łukasiewicz’s rejection method. The present paper provides a new, Hilbert-type axiomatization (along with related systems to axiomatize classical contradictions, non-contradictions, contingencies and non-contingencies respectively). This new system is mathematically less elegant, but the format of the inferential rules and the structure of the completeness proof possess some intrinsic interest and suggests instructive comparisons with the logic of tautologies.

  177. 1991: ‘Truth, Falsehood, and Beyond’, in Liliana Albertazzi and Roberto Poli (eds.), Topics in Philosophy and Artificial Intelligence, Bozen, Mitteleuropäisches Kulturinstitut, 1991, pp. 39–50.

    Abstract. Always in the background and sometimes in the foreground of standard semantics is a twofold assumption on the admissible state representations: every sentence must be either true or false (completeness); no sentence can be both true and false (consistency). In these notes, a more general semantic framework is presented in which incomplete and/or inconsistent structures are admitted as bona fide models. The approach is based on a lattice-theoretic generalization of supervaluational techniques and is discussed with special reference to sentential languages.

  178. 1990b: ‘Complementary Sentential Logics’, Bulletin of the Section of Logic, 19:4 (1990), 112–116.

    Abstract. It is shown that a complete axiomatization of classical non-tautologies can be obtained by taking F (falsehood) as the sole axiom along with the two inference rules: (i) if A is a substitution instance of B, then AB; and (ii) if A is obtained from B by replacement of equivalent sentences, then AB (counting as equivalent the pairs {T, ~F}, {F, F&F}, {F, F&T}, {F, T&F}, {T, T&T}). Since the set of tautologies is also specifiable by purely syntactic means, the resulting picture gives an improved syntactic account of classical sentential logic. The picture can then be completed by considering related systems that prove adequate to specify the set of contradictions, the set of non-contradictions, and the set of contingencies respectively.

  179. 1990a: ‘La logica della vaghezza’ [The Logic of Vagueness], in Pietro Ciaravolo (ed.), Informatica e Metodologia Filosofica, Rome, Cadmo, 1990, pp. 107–124 (reissued: Rome, Aracne, 2006).

    Abstract. An outline and defense of what has come to be known as the supervaluational account of vagueness.

  180. 1986, with William E. Seager: ‘Dual Logics’ (Abstract), in Recent Developments in Epistemology and Philosophy of Science. Abstracts of the 11th International Wittgenstein Symposium, Kirchberg am Wechsel, Österreichische Ludwig Wittgenstein Gesellschaft, 1986, p. 42.

    Abstract. Given a set of sentences S, let its dual be the set S*={A: ~A is in S}. If S is the set of all theorems of classical sentential logic, then obviously S* is axiomatizable. More generally, it turns out that if S is closed under the principle of double negation, i.e. if A is in S iff ~~A is in S, then S is axiomatizable iff S* is also axiomatizable. In this work we provide a simple proof of this fact, along with an investigation of the general conditions under which the converse holds as well. The philosophical import of these facts is then discussed in relation to the task of determining adequate criteria for characterizing constructive logic and mathematics.

  181. 1983: ‘Free Semantics: Supervaluations at the Predicate Level’, in Paul Weingartner and Johannes Czermak (eds.), Epistemology and Philosophy of Science. Proceedings of the 7th International Wittgenstein Symposium, Vienna, Hölder-Pichler-Tempsky, 1983, pp. 35–38.

    Abstract. A semantic characterization of free predicate logic based on a new method for extrapolating supervaluations from partial models (as functions registering the pattern of agreement of the relevant completion classes). An extension of the approach to languages involving definite and/or indefinite descriptions is also outlined, though it can be shown that the resulting notion of logical truth cannot be captured axiomatically.

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5. Encyclopedia Entries

  1. 2005: ‘Ontologia’ [Ontology], in Grande Dizionario Enciclopedico. Appendice 2005, Turin, Utet, 2005, pp. 605–607.

  2. 2004: ‘Boundary’, in Edward N. Zalta (ed.), Stanford Encyclopedia of Philosophy, Stanford (CA), CSLI, 2004 (online).
    Revised and expanded: 2007.
    ~Italian translation by Elena Casetta: ‘Confini. Dove finisce una cosa e inizia un’altra’, in Andrea Bottani and Richard Davies (eds.), Ontologie regionali, Milan, Mimesis, 2007, pp. 209–222.
    Revised and expanded: 2008.
    Revised and expanded: 2013.
    Revised and expanded: 2023.

  3. 2003b: ‘Mereology’, in Edward N. Zalta (ed.), Stanford Encyclopedia of Philosophy, Stanford (CA), CSLI, 2003 (online).
    Revised and expanded: 2009.
    Revised and expanded: 2014.
    Revised and expanded: 2015.
    Revised and expanded: 2016.

  4. 2003a: ‘Vagueness’, in Lynn Nadel (ed. in chief), Encyclopedia of Cognitive Science, London, Macmillan and Nature Publishing Group, 2003, Volume 4, pp. 459–464.

  5. 2002, with Roberto Casati: ‘Events’, in Edward N. Zalta (ed.), Stanford Encyclopedia of Philosophy, Stanford (CA), CSLI, 2002 (online).
    Revised and expanded: 2006.
    Revised and expanded: 2014.
    Revised and expanded: 2020.
    Revised and expanded: 2023.

  6. 1996, with Roberto Casati: ‘Holes’, in Edward N. Zalta (ed.), Stanford Encyclopedia of Philosophy, Stanford (CA), CSLI, 1996 (online).
    Revised and expanded: 2003.
    ~ Hungarian translation by Polgárdi Ákos: ‘Lyukak’, Különbség, 8:1 (2004), 149–154.
    Revised and expanded: 2009.
    ~ Portuguese translation by Rodrigo Reis Lastra Cid: ‘Buracos’, Fundamento: Revista de Pesquisa em Filosofia, 1:1 (2010), 234–244.
    Revised and expanded: 2014.
    Revised and expanded: 2019.
    Revised and expanded: 2023.

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6. Book Reviews and Critical Notices

  1. 2006: Critical Notice of John Heil, From an Ontological Point of View [Oxford, Oxford University Press, 2003], Philosophical Books, 47:2 (2006), 148–154.

  2. 2005b: Review of Herbert Hochberg and Kevin Mulligan (eds.), Relations and Predicates [Frankfurt, Ontos Verlag, 2004], Notre Dame Philosophical Reviews, 10.06 (2005).

  3. 2005a, with Elena Casetta: Review of Benjamin Morison, On Location: Aristotle’s Concept of Space [Oxford, Oxford University Press, 2002], Dialectica, 59:1 (2005), 75–81.

  4. 2004: Review of Ermanno Bencivenga, Parole che contano [Milan, Mondadori, 2004], La Stampa, March 22, 2004, p. 27.

  5. 2003: Review of Dario Voltolini, I confini di Torino [Rome, Quiritta Edizioni, 2003], La Stampa, July 26, 2003, p. 23.

  6. 2002: Review of Evandro Agazzi and Nicla Vassallo (eds.), Introduzione al Naturalismo Filosofico Contemporaneo [Milan, Franco Angeli, 1998], Epistemologia, 25:1 (2002), 167–171.

  7. 2001b: Critical Notice of Amie L. Thomasson, Fiction and Metaphysics [Cambridge, Cambridge University Press, 1999], Philosophy and Phenomenological Research, 63:3 (2001), 723–727.

  8. 2001a: Review of André Gallois, Occasions of Identity. A Study in the Metaphysics of Persistence, Change, and Sameness [Oxford, Clarendon Press, 1998], Australasian Journal of Philosophy, 79:2 (2001), 291–295.

  9. 2000: Review of Brian McGuinness (ed.), Language, Logic and Formalization of Knowledge [Gaeta, Bibliotheca, 1998], Studia Logica, 66:3 (2000), 437–440.

  10. 1999: Critical Notice of Roberto Cordeschi, La scoperta dell’artificiale: Psicologia, filosofia e macchine intorno alla cibernetica [Milan, Masson-Dunod, 1998], and Domenico Parisi, Mente: I nuovi modelli della Vita Artificiale [Bologna, Il Mulino, 1999], La rivista dei libri, 9:11 (1999), 29–31.

  11. 1998b: Review of Susan Haack, Deviant Logic, Fuzzy Logic: Beyond the Formalism [Chicago, University of Chicago Press, 1996], The Philosophical Review, 107:3 (1998), 468–471.

  12. 1998a: Critical Notice of Umberto Eco, Kant e l’ornitorinco, and Patrizia Violi, Significato ed Esperienza [both Milan, Bompiani, 1997], La Rivista dei Libri, 8:2 (1998), 10–13.

  13. 1996b: Review of Yiannis N. Moschovakis, Notes on Set Theory [New York, Springer, 1994], History and Philosophy of Logic, 17:1 (1996), 172–175.

  14. 1996a, with Francesco Orilia: Review of Anil Gupta and Nuel Belnap, The Revision Theory of Truth [Cambridge (MA), MIT Press, 1993], Minds and Machines, 6:1 (1996), 124–129.

  15. 1993: Review of Gennaro Chierchia, ‘Logica e linguistica. Il contributo di Montague’ [Ch. 8 of Marco Santambrogio (ed.), Introduzione alla filosofia analitica del linguaggio, Rome, Laterza, 1992], Acta Analytica, 10 (1993), 182–185.

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7. Varia

  1. 2023: ‘A Conversation with Achille Varzi’, interview by Andrea Borghini, APhEx, 27 (2923), 176–212.

  2. 2022: ‘La semplicità come sfida’ [Simplicity as a Challenge], interview by Leonardo Caffo, Il Corriere della Sera – Sette, November 2022, pp. 80–82.

  3. 2017: ‘Achille Varzi on Philosophy and the Academy’, interview by Aaron Friedman, The Gadfly, September 7, 2017.

  4. 2016: ‘Die Kruste der nutzlosen Komplikationen’ [The Crust of Useless Complications], interview by Chiara Somajni, Brand Eins, 18:6 (2016), 102–105.

  5. 2014: ‘Filosofia: fumosa erudizione?’ [Philosophy: Fumy Erudition?], interview by Manuela Puccia, Uomo Città Territorio, 39:466 (2014), 23–26.

  6. 2013: ‘Interview d’Achille Varzi’, interview by Parissa Farmanfarmaian, Iphilo 5 (2013), 18–21.

  7. 2010: ‘Intervista ad Achille Varzi’, interview by Leonardo Caffo, Rivista Italiana di Filosofia Analitica Junior, 1:1 (2010), 1–11.

  8. 2009: ‘E la società liquida riscopre l’ontologia’ [And Liquid Society Rediscovers Ontology], interview by Andrea Lavazza, Vita e Pensiero, 92:1 (2009), 65–72.

  9. 2008b: ‘I Wrote This Next Year: Varzi on Time Travel’, interview by Adam Waksman, The Gadfly, Spring 2008, pp. 7–11.

  10. 2008a: ‘Ze zijn er wel’ [Still, They Are There], in Easy Aloha, Gaten en andere dingen die er niet zijn, Amsterdam, Nieuw Amsterdam, 2008, pp. 34–35.

  11. 2007c: ‘“Arriverò ieri!” Filosofia, linguaggio e viaggi nel tempo’ [“I’ll arrive Yesterday!” Philosophy, Language, and Trime Travel], interview by Luca Morena and Giuliano Torrengo, Notable, 1, March 2007, pp 23–24.

  12. 2007b, with Laura di Summa: ‘Listen to the World Beneath Your Feet’, Cluster, 6 (2007), 128–135.

  13. 2007a: ‘Logic and Language’, interview by Adam Waksman, The Gadfly, Spring 2007, pp. 7–11.

  14. 2006: ‘L’attualità della metafisica tra USA ed Europa’ [The Actuality of Metaphysics between USA and Europe], interview by Giovanni Cogliandro, Il giornale di filosofia, November 2006.

  15. 2005: ‘Le linee di un racconto’ [The Lines of a Tale], in Matteo Pericoli, New York e altri disegni, Macerata, Quodlibet, 2005, pp. 9–12.

  16. 2004: ‘Il sequenzialismo di A.C.A.’ [A.C.A.’s Sequentialism], in Elaborazioni, catalogue of the art exhibition, Sciacca (Italy), 2004, p. 11.

  17. 2003: ‘Ineffabile sfera’ [Ineffable Sphere], Nazione Indiana (online publication), July 17, 2003.
    Reprinted with revisions as ‘Il piano di un quadrato’ in [1:2010].
    Revised English version as [4:2011b].

  18. 2002b: ‘Ontologia e informatica medica’ [Ontology and Medical Information Science], interview by Sabatino Cariati, Il giornale del medico, 19 (2002), May 27, p. 17.

  19. 2002a: ‘Philosophie italienne: quoi de neuf?’ [Italian Philosophy: What’s New?], Magazine Litéraire, 407 (2002), 50–52.
    Reprinted in La littérature italienne. De Dante à Tabucchi, en passant par Calvino, Paris, Sophia Publications, 2013 (e-book).
    Italian translation: ‘Filosofia italiana: cosa c’è di nuovo?’, Il giornale della filosofia, 11 (2004), pp. 15–16.

  20. 1999: ‘The Other Face of Metaphysics’, Philosophy Today, 12:30 (1999), 3–5.

  21. 1995b: ‘Il linguaggio dell’informatica e la disambiguazione’ [The Language of Computers and Disambiguation’], in Gianni Sembianti (ed.), Metropolis. Saggio sulla comunicazione umana, Rome, Armando, 1995, pp. 310–314.

  22. 1995a: ‘Il linguaggio formale della teoria degli insiemi’ [The Formal Language of Set Theory], in Gianni Sembianti (ed.), Metropolis. Saggio sulla comunicazione umana, Rome, Armando, 1995, pp. 295–305.

  23. 1994b: ‘Intelligenza artificiale, metafisica, e gruyère’ [Artificial Intelligence, Metaphysics, and Gruyère], Sistemi & Impresa, 40:2 (1994), 15–19.

  24. 1994a: ‘Sull’intelligenza delle macchine’ [On Machine Intelligence], in Maria Vittoria Nodari (ed.), La società dell’informazione, Vicenza, Edizioni del Rezzara, 1994, pp. 37–48.

  25. 1993: ‘Note in margine: La metafisica del senso comune’ [Notes on the Metaphysics of Common Sense], AI*IA Notizie, 6:4 (1993), 29–33.

  26. 1991: ‘L’intelligenza e l’artificiale’ [Intelligence and the Artificial], KOS. Rivista di Scienza e Etica, 7:66 (1991), 12–19

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8. Newspaper Articles (in Italian)

  1. 2018c, with Roberto Casati: ‘Buon anno!’, Il Sole 24 Ore, March 4, 2018, p. 27.

  2. 2018b, with Roberto Casati: ‘Tutto a un euro’, Il Sole 24 Ore, February 18, 2018, p. 26.
    Reprinted in L’eco del “Sapèl né”, 299 (2021), p. 11.

  3. 2018a, with Roberto Casati: ‘Regali da riciclare’, Il Sole 24 Ore, January 7, 2018, p. 24.

  4. 2017m', with Roberto Casati: ‘Cartelli Scheleriani’, Il Sole 24 Ore, December 17, 2017, p. 34.

  5. 2017l', with Roberto Casati: ‘Adesso non vi sto parlando’, Il Sole 24 Ore, December 10, 2017, p. 29.
    Reprinted: January 21, 2018, p. 24.

  6. 2017k', with Roberto Casati: ‘Privacy violata’, Il Sole 24 Ore, December 3, 2017, p. 30.

  7. 2017j', with Roberto Casati: ‘Migliorie stravaganti’, Il Sole 24 Ore, November 26, 2017, p. 29.

  8. 2017i', with Roberto Casati: ‘Raddoppio al ribasso’, Il Sole 24 Ore, November 19, 2017, p. 30.

  9. 2017h', with Roberto Casati: ‘Il colore della vincita’, Il Sole 24 Ore, November 12, 2017, p. 24.

  10. 2017g', with Roberto Casati: ‘La Gioconda di Tuxy (Art Detector 4.0)’, Il Sole 24 Ore, November 5, 2017, p. 24.

  11. 2017f', with Roberto Casati: ‘Art Detector, Versione 3.0’, Il Sole 24 Ore, October 29, 2017, p. 29.

  12. 2017e', with Roberto Casati: ‘Art Detector, Versione 2.0’, Il Sole 24 Ore, October 22, 2017, p. 24.

  13. 2017d', with Roberto Casati: ‘Art Detector’, Il Sole 24 Ore, October 15, 2017, p. 26.

  14. 2017c', with Roberto Casati: ‘Il cranio di Mozart giovane’, Il Sole 24 Ore, October 8, 2017, p. 26.

  15. 2017b', with Roberto Casati: ‘Trono di spade’, Il Sole 24 Ore, October 1, 2017, p. 24.

  16. 2017a', with Roberto Casati: ‘Essere ridondanti ma stupire’, Il Sole 24 Ore, September 24, 2017, p. 26.

  17. 2017z, with Roberto Casati: ‘Accosta a babordo’, Il Sole 24 Ore, September 17, 2017, p. 28.

  18. 2017y, with Roberto Casati: ‘La macchina dello spazio’, Il Sole 24 Ore, August 27, 2017, p. 20.

  19. 2017x, with Roberto Casati: ‘Non mischiate le acque’, Il Sole 24 Ore, August 20, 2017, p. 20.

  20. 2017w, with Roberto Casati: ‘Un mondo dispari’, Il Sole 24 Ore, August 13, 2017, p. 22.

  21. 2017v, with Roberto Casati: ‘Raddoppio di temperatura’, Il Sole 24 Ore, August 6, 2017, p. 20.

  22. 2017u, with Roberto Casati: ‘Ma che caldo fa’, Il Sole 24 Ore, July 30, 2017, p. 24.

  23. 2017t, with Roberto Casati: ‘Antica Saggineria Usabene’, Il Sole 24 Ore, July 23, 2017, p. 24.

  24. 2017s, with Roberto Casati: ‘I colori di Tuxy’, Il Sole 24 Ore, July 9, 2017, p. 26.

  25. 2017r, with Roberto Casati: ‘Il sapore della paprika’, Il Sole 24 Ore, July 2, 2017, p. 24.

  26. 2017q, with Roberto Casati: ‘Mìlorie ortokrafiqe’, Il Sole 24 Ore, June 25, 2017, p. 26.

  27. 2017p, with Roberto Casati: ‘Baccano contenzioso’, Il Sole 24 Ore, June 18, 2017, p. 22.

  28. 2017o: ‘Filosofo controcorrente’, Il Sole 24 Ore, June 11, 2017, p. 24.

  29. 2017n, with Roberto Casati: ‘Divieti a Festafesta’, Il Sole 24 Ore, June 4, 2017, p. 24.

  30. 2017m, with Roberto Casati: ‘Raccolta differenziata’, Il Sole 24 Ore, May 14, 2017, p. 26.

  31. 2017l, with Roberto Casati: ‘Comunicati nonistituzionali’, Il Sole 24 Ore, May 7, 2017, p. 26.

  32. 2017k, with Roberto Casati: ‘La sorella della sorella’, Il Sole 24 Ore, April 30, 2017, p. 28.

  33. 2017j, with Roberto Casati: ‘In coppia l’intelligenza raddoppia’, Il Sole 24 Ore, April 23, 2017, p. 21.

  34. 2017i, with Roberto Casati: ‘La montagna più alta’, Il Sole 24 Ore, April 16, 2017, p. 27.

  35. 2017h, with Roberto Casati: ‘L’appartamento più alto’, Il Sole 24 Ore, April 2, 2017, p. 24.

  36. 2017g, with Roberto Casati: ‘L’esperto di Rischiatutto’, Il Sole 24 Ore, March 26, 2017, p. 26.

  37. 2017f, with Roberto Casati: ‘Un inventario come si deve’, Il Sole 24 Ore, February 26, 2017, p. 30.

  38. 2017e, with Roberto Casati: ‘Mica facile fare da sfondo’, Il Sole 24 Ore, February 19, 2017, p. 27.

  39. 2017d, with Roberto Casati: ‘Sorprendentemente sorprendente’, Il Sole 24 Ore, February 12, 2017, p. 26.

  40. 2017c, with Roberto Casati: ‘Doveri negativi’, Il Sole 24 Ore, February 5, 2017, p. 26.

  41. 2017b, with Roberto Casati: ‘Accuse personali’, Il Sole 24 Ore, January 29, 2017, p. 28.

  42. 2017a, with Roberto Casati: ‘Domande autorispondenti’, Il Sole 24 Ore, January 8, 2017, p. 26.

  43. 2016o', with Roberto Casati: ‘È due volte Natale’, Il Sole 24 Ore, December 18, 2016, p. 34.

  44. 2016n', with Roberto Casati: ‘L’autobus del tempo’, Il Sole 24 Ore, December 11, 2016, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  45. 2016m', with Roberto Casati: ‘Non sarebbe potuta essere migliore’, Il Sole 24 Ore, November 13, 2016, p. 28.

  46. 2016l', with Roberto Casati: ‘Chi ben comincia...’, Il Sole 24 Ore, November 6, 2016, p. 28.

  47. 2016k', with Roberto Casati: ‘Libertà determinata’, Il Sole 24 Ore, October 30, 2016, p. 28.

  48. 2016j', with Roberto Casati: ‘La profezia che si autofalsifica’, Il Sole 24 Ore, October 23, 2016, p. 26.

  49. 2016i', with Roberto Casati: ‘Coadiuvanti diagnostici’, Il Sole 24 Ore, October 9, 2016, p. 26.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).
    Polish translation by Patrycja Mikulska: ‘Pomoce diagnostyczne’, Filozofuj!, October 6, 2017.

  50. 2016h', with Roberto Casati: ‘Un perdente necessario’, Il Sole 24 Ore, September 25, 2016, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  51. 2016g', with Roberto Casati: ‘Il cancellatore di passati’, Il Sole 24 Ore, September 18, 2016, p. 31.

  52. 2016f', with Roberto Casati: ‘Controllo d’identità’, Il Sole 24 Ore, September 4, 2016, p. 30.

  53. 2016e', with Roberto Casati: ‘Una password come si deve’, Il Sole 24 Ore, August 28, 2016, p. 22.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  54. 2016d', with Roberto Casati: ‘Protezione antimeduse’, Il Sole 24 Ore, August 21, 2016, p. 22.

  55. 2016c', with Roberto Casati: ‘Dilemmi di una spiaggia affollata’, Il Sole 24 Ore, August 14, 2016, p. 22.

  56. 2016b', with Roberto Casati: ‘Popolazioni e omissioni’, Il Sole 24 Ore, August 7, 2016, p. 22.
    Reprinted with revisions in [2:2017b], ‘PopolI e omissioni’ (also available in Chinese translation).

  57. 2016a', with Roberto Casati: ‘La semplice verità’, Il Sole 24 Ore, July 31, 2016, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  58. 2016z, with Roberto Casati: ‘Statistiche marziane’, Il Sole 24 Ore, July 24, 2016, p. 26.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  59. 2016y, with Roberto Casati: ‘Questione di sfortuna’, Il Sole 24 Ore, July 17, 2016, p. 26.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).
    Reprinted in Nuova Tèchne, 26 (2018), online edition.

  60. 2016x, with Roberto Casati: ‘Finalmente è possibile’, Il Sole 24 Ore, July 10, 2016, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  61. 2016w, with Roberto Casati: ‘Tutto prenotato’, Il Sole 24 Ore, July 3, 2016, p. 28.

  62. 2016v, with Roberto Casati: ‘Etichette sottrattive’, Il Sole 24 Ore, June 26, 2016, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  63. 2016u, with Roberto Casati: ‘Due più tre uguale quattro’, Il Sole 24 Ore, June 19, 2016, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  64. 2016t, with Roberto Casati: ‘Ritratto in treno’, Il Sole 24 Ore, June 12, 2016, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  65. 2016s, with Roberto Casati: ‘Accelerazione di gravità’, Il Sole 24 Ore, June 5, 2016, p. 32.

  66. 2016r, with Roberto Casati: ‘The new time machine’, Il Sole 24 Ore, May 29, 2016, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation), ‘Modello Time Stopper’.

  67. 2016q, with Roberto Casati: ‘Si prega di non disturbare’, Il Sole 24 Ore, May 22, 2016, p. 30.

  68. 2016p, with Roberto Casati: ‘Due tipi di possibilità’, Il Sole 24 Ore, May 8, 2016, p. 32.

  69. 2016o, with Roberto Casati: ‘Casa Editrice Iterazioni’, Il Sole 24 Ore, May 1, 2016, p. 32.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  70. 2016n, with Roberto Casati: ‘Libertà condizionata’, Il Sole 24 Ore, April 24, 2016, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  71. 2016m, with Roberto Casati: ‘C’è solo il tutto’, Il Sole 24 Ore, April 17, 2016, p. 28.

  72. 2016l, with Roberto Casati: ‘Se solo l’avessi fatto’, Il Sole 24 Ore, April 10, 2016, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).
    Polish translation by Patrycja Mikulska: ‘Plutarch i petunie’, in Marcin Iwanicki and Jacek Jarocki (eds.), 27 podróży filozoficznych. Przewodnik (nie tylko) Pascala, Lublin, Katolicki Uniwersytet Lubelski Jana Pawła II, 2018, p. 52.

  73. 2016k, with Roberto Casati: ‘Un CV davvero completo’, Il Sole 24 Ore, April 3, 2016, p. 30.
    Reprinted with revisions in [2:2017b], ‘Un CV completo’ (also available in Chinese translation).

  74. 2016j, with Roberto Casati: ‘Finestre a specchio’, Il Sole 24 Ore, March 27, 2016, p. 26.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  75. 2016i, with Roberto Casati: ‘Bilancia precisissima’, Il Sole 24 Ore, March 20, 2016, p. 30.

  76. 2016h, with Roberto Casati: ‘Un muro davvero speciale’, Il Sole 24 Ore, March 6, 2016, p. 28.
    Reprinted with revisions in [2:2017b], ‘Un muro fuorilegge’ (also available in Chinese translation).
    Polish translation by Patrycja Mikulska: ‘Mur wyjęty spod prawa’, Filozofuj!, February 20, 2023.

  77. 2016g, with Roberto Casati: ‘Non vedo l’ora’, Il Sole 24 Ore, February 28, 2016, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  78. 2016f, with Roberto Casati: ‘Doppio concerto’, Il Sole 24 Ore, February 21, 2016, p. 28.

  79. 2016e, with Roberto Casati: ‘Punto, linea, e superficie!’, Il Sole 24 Ore, January 31, 2016, p. 26.

  80. 2016d, with Roberto Casati: ‘Circa centoventinove’, Il Sole 24 Ore, January 24, 2016, p. 26.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  81. 2016c, with Roberto Casati: ‘Tanto lavoro per nulla’, Il Sole 24 Ore, January 17, 2016, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  82. 2016b, with Roberto Casati: ‘La lampada di Zenone’, Il Sole 24 Ore, January 10, 2016, p. 27.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  83. 2016a, with Roberto Casati: ‘De existentia Epiphaniae’, Il Sole 24 Ore, January 3, 2016, p. 24.

  84. 2015p', with Roberto Casati: ‘Il gioco delle tasse’, Il Sole 24 Ore, December 27, 2015, p. 24.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  85. 2015o', with Roberto Casati: ‘Perché Babbo Natale esiste’, Il Sole 24 Ore, December 20, 2015, p. 36.
    Reprinted with revisions in [2:2017b], ‘De existentia Patris Natalis’ (also available in Chinese translation).

  86. 2015n', with Roberto Casati: ‘Bella carta da regalo’, Il Sole 24 Ore, December 13, 2015, p. 32.

  87. 2015m', with Roberto Casati: ‘Graffiti concettuali’, Il Sole 24 Ore, December 6, 2015, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  88. 2015l', with Roberto Casati: ‘Nomi ricorsivi’, Il Sole 24 Ore, November 29, 2015, p. 32.

  89. 2015k', with Roberto Casati: ‘Un ronzio fastidioso’, Il Sole 24 Ore, November 22, 2015, p. 32.

  90. 2015j', with Roberto Casati: ‘Qualcuno sa che ora è?’, Il Sole 24 Ore, November 15, 2015, p. 30.

  91. 2015i', with Roberto Casati: ‘Parlagatto, nuovo modello’, Il Sole 24 Ore, November 1, 2015, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  92. 2015h', with Roberto Casati: ‘Pianeti allineati’, Il Sole 24 Ore, October 25, 2015, p. 28.

  93. 2015g', with Roberto Casati: ‘Notizie a rovescio’, Il Sole 24 Ore, October 18, 2015, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  94. 2015f', with Roberto Casati: ‘Nuova terapia genica zombie’, Il Sole 24 Ore, October 11, 2015, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  95. 2015e', with Roberto Casati: ‘Epistemologia quotidiana’, Il Sole 24 Ore, September 27, 2015, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  96. 2015d', with Roberto Casati: ‘Giornata al cinquanta per cento’, Il Sole 24 Ore, September 20, 2015, p. 28.

  97. 2015c', with Roberto Casati: ‘Annientare il pianeta ronzante’, Il Sole 24 Ore, August 23, 2015, p. 22.

  98. 2015b', with Roberto Casati: ‘Cani, escrementi e padroni’, Il Sole 24 Ore, August 9, 2015, p. 22.
    Reprinted with revisions in [2:2017b], ‘Cani e padroni’ (also available in Chinese translation).

  99. 2015a', with Roberto Casati: ‘Il prototipo del parlagatto’, Il Sole 24 Ore, August 2, 2015, p. 22.
    Reprinted with revisions in [2:2017b], ‘Il parlagatto’ (also available in Chinese translation).

  100. 2015z, with Roberto Casati: ‘Fotografia di un’assenza’, Il Sole 24 Ore, July 26, 2015, p. 26.
    Polish translation by Patrycja Mikulska: ‘Fotografia nieobecności’, Filozofuj!, September 26, 2023.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  101. 2015y, with Roberto Casati: ‘Margine di tolleranza’, Il Sole 24 Ore, July 19, 2015, p. 27.
    Reprinted with revisions in [2:2017b], ‘Tolleranza zero’ (also available in Chinese translation).

  102. 2015x, with Roberto Casati: ‘Il gomitolo cresce a piacere’, Il Sole 24 Ore, July 5, 2015, p. 26.
    Polish translation by Patrycja Mikulska: ‘Kłąb tak wielki, jak tylko sechcesz’, Filozofuj!, 10:4 (2016), p. 48.
    Reprinted with revisions in [2:2017b], ‘Il gomitolo che cresce a piacere’ (also available in Chinese translation).

  103. 2015w, with Roberto Casati: ‘Sale e curry, questione di gusti’, Il Sole 24 Ore, June 28, 2015, p. 28.
    Reprinted with revisions in [2:2017b], ‘Sale, curry, e cuffie’ (also available in Chinese translation).

  104. 2015v, with Roberto Casati: ‘Saggezza epicurea del vivere’, Il Sole 24 Ore, June 21, 2015, p. 28.

  105. 2015u, with Roberto Casati: ‘Messaggio nella placca del Pioneer’, Il Sole 24 Ore, June 7, 2015, p. 28.
    Reprinted with revisions in [2:2017b], ‘La placca del Pioneer’ (also available in Chinese translation).

  106. 2015t, with Roberto Casati: ‘Un quarto di MP3’, Il Sole 24 Ore, May 31, 2015, p. 26.

  107. 2015s, with Roberto Casati: ‘La parola chiave’, Il Sole 24 Ore, May 24, 2015, p. 26.

  108. 2015r, with Roberto Casati: ‘Un prezzo per avere niente’, Il Sole 24 Ore, May 17, 2015, p. 32.
    Reprinted with revisions in [2:2017b], ‘Il prezzo di niente’ (also available in Chinese translation).

  109. 2015q, with Roberto Casati: ‘Lasciate il bagno pulito’, Il Sole 24 Ore, May 3, 2015, p. 28.
    Reprinted with revisions in [2:2017b], ‘Rispettiamo gli altri utenti’ (also available in Chinese translation).

  110. 2015p, with Roberto Casati: ‘I vari modi di leggere una frase’, Il Sole 24 Ore, April 26, 2015, p. 28.

  111. 2015o, with Roberto Casati: ‘Il tempo manca’, Il Sole 24 Ore, April 19, 2015, p. 28.
    Reprinted with revisions in [2:2017b], ‘Il tempo che manca’ (also available in Chinese translation).

  112. 2015n, with Roberto Casati: ‘Schiavi della libertà’, Il Sole 24 Ore, April 5, 2015, p. 26.

  113. 2015m, with Roberto Casati: ‘Lezioni di automereologia’, Il Sole 24 Ore, March 29, 2015, p. 26.

  114. 2015l, with Roberto Casati: ‘L’unico difetto? Dire bugie’, Il Sole 24 Ore, March 22, 2015, p. 28.

  115. 2015k, with Roberto Casati: ‘Vaccinarsi contro le profezie’, Il Sole 24 Ore, March 15, 2015, p. 28.

  116. 2015j, with Roberto Casati: ‘Occhio alle rivoluzioni’, Il Sole 24 Ore, March 8, 2015, p. 26.

  117. 2015i, with Roberto Casati: ‘Un terribile attacco di ipoconodria’, Il Sole 24 Ore, March 1, 2015, p. 28.

  118. 2015h, with Roberto Casati: ‘Divertirsi contando fino a cento’, Il Sole 24 Ore, February 22, 2015, p. 29.
    Reprinted with revisions in [2:2017b], ‘Scorciatoie di calcolo’ (also available in Chinese translation).

  119. 2015g, with Roberto Casati: ‘I filosofi e le loro sette virtù’, Il Sole 24 Ore, February 15, 2015, p. 26.

  120. 2015f, with Roberto Casati: ‘Rivincita antiscettica’, Il Sole 24 Ore, February 8, 2015, p. 30.

  121. 2015e, with Roberto Casati: ‘Stratosferici miliardi di stelle’, Il Sole 24 Ore, February 1, 2015, p. 28.

  122. 2015d, with Roberto Casati: ‘Gli occhiali giusti’, Il Sole 24 Ore, January 25, 2015, p. 28.

  123. 2015c, with Roberto Casati: ‘Colori e percezioni’, Il Sole 24 Ore, January 18, 2015, p. 31.

  124. 2015b, with Roberto Casati: ‘Sviste d’artista’, Il Sole 24 Ore, January 11, 2015, p. 28.
    Reprinted with revisions in [2:2017b], ‘Misfatti’ (also available in Chinese translation).

  125. 2015a, with Roberto Casati: ‘Oxford comma’, Il Sole 24 Ore, January 4, 2015, p. 22.
    Reprinted with revisions in [2:2017b], ‘Quella virgola di Oxford’ (also available in Chinese translation).

  126. 2014v', with Roberto Casati: ‘Ogni regola ha la sua eccezione’, Il Sole 24 Ore, December 28, 2014, p. 23.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  127. 2014u', with Roberto Casati: ‘Concordo, non sono d’accordo’, Il Sole 24 Ore, December 21, 2014, p. 36.

  128. 2014t', with Roberto Casati: ‘Problemi di traduzione’, Il Sole 24 Ore, December 14, 2014, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  129. 2014s', with Roberto Casati: ‘Una rondine che fa primavera’, Il Sole 24 Ore, December 7, 2014, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  130. 2014r', with Roberto Casati: ‘Tutti commettono un errore’, Il Sole 24 Ore, November 23, 2014, p. 28.

  131. 2014q', with Roberto Casati: ‘Chi ruba il carrello ha colpa?’, Il Sole 24 Ore, November 16, 2014, p. 28.
    Reprinted with revisions in [2:2017b], ‘Il furto del carrello’ (also available in Chinese translation).

  132. 2014p', with Roberto Casati: ‘Prodotti per pulire la galassia’, Il Sole 24 Ore, November 9, 2014, p. 30.

  133. 2014o', with Roberto Casati: ‘Buon compleanno galattico’, Il Sole 24 Ore, November 2, 2014, p. 28.

  134. 2014n', with Roberto Casati: ‘Pregare fumando, e viceversa’, Il Sole 24 Ore, October 26, 2014, p. 30.

  135. 2014m', with Roberto Casati: ‘Il finestrino dipende dal contesto’, Il Sole 24 Ore, October 19, 2014, p. 28.

  136. 2014l', with Roberto Casati: ‘La strada dritta pendente’, Il Sole 24 Ore, October 12, 2014, p. 28.

  137. 2014k', with Roberto Casati: ‘La torre pendente raddrizzata’, Il Sole 24 Ore, October 5, 2014, p. 26.

  138. 2014j', with Roberto Casati: ‘Operazione puntualità assoluta’, Il Sole 24 Ore, September 21, 2014, p. 32.

  139. 2014i', with Roberto Casati: ‘La regola che fa eccezione’, Il Sole 24 Ore, September 14, 2014, p. 28.
    Reprinted with revisions in [2:2017b], ‘L’eccezione che fa la regola’ (also available in Chinese translation).

  140. 2014h', with Roberto Casati: ‘Piove: correre o camminare?’, Il Sole 24 Ore, August 31, 2014, p. 22.

  141. 2014g', with Roberto Casati: ‘Un corpo da perfetta caffettiera’, Il Sole 24 Ore, August 24, 2014, p. 20.
    Reprinted with revisions in [2:2017b], ‘Il manuale precisissimo’ (also available in Chinese translation).

  142. 2014f', with Roberto Casati: ‘Password troppo oggettive’, Il Sole 24 Ore, August 17, 2014, p. 20.

  143. 2014e', with Roberto Casati: ‘La parola al pianeta Terluna’, Il Sole 24 Ore, August 10, 2014, p. 20.

  144. 2014d', with Roberto Casati: ‘Negazioni doppie e triple’, Il Sole 24 Ore, August 3, 2014, p. 20.
    Reprinted with revisions in [2:2017b], ‘Doppia negazione’ (also available in Chinese translation).

  145. 2014c', with Roberto Casati: ‘Cambio di mano graduale’, Il Sole 24 Ore, July 27, 2014, p. 24.

  146. 2014b', with Roberto Casati: ‘Stella cerca una nuova identità’, Il Sole 24 Ore, July 20, 2014, p. 24.

  147. 2014a', with Roberto Casati: ‘Rinforzate le parti bianche!’, Il Sole 24 Ore, July 13, 2014, p. 24.
    Reprinted with revisions in [2:2017b], ‘Rinforzare le parti solide!’ (also available in Chinese translation).
    Polish translation by Patrycja Mikulska: ‘Wzmocnić miejsca mocne!’, Filozofuj!, December 28, 2017.

  148. 2014z, with Roberto Casati: ‘Basta coi titoli “chiasmatici”!’, Il Sole 24 Ore, July 6, 2014, p. 26.

  149. 2014y, with Roberto Casati: ‘Misure autoreferenziali’, Il Sole 24 Ore, June 29, 2014, p. 26.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  150. 2014x, with Roberto Casati: ‘Correggi a caso o a casa?’, Il Sole 24 Ore, June 22, 2014, p. 28.

  151. 2014w, with Roberto Casati: ‘Più vecchio sei e meno invecchi’, Il Sole 24 Ore, June 15, 2014, p. 28.

  152. 2014v, with Roberto Casati: ‘Angeli e diavoli al 5%’, Il Sole 24 Ore, June 8, 2014, p. 26.

  153. 2014u, with Roberto Casati: ‘Nell’Utopia c’è un posto per tutti’, Il Sole 24 Ore, June 1, 2014, p. 26.

  154. 2014t, with Roberto Casati: ‘Quando è troppo è troppo’, Il Sole 24 Ore, May 18, 2014, p. 26.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  155. 2014s, with Roberto Casati: ‘Lunga vita alle didascalie’, Il Sole 24 Ore, May 11, 2014, p. 29.

  156. 2014r, with Roberto Casati: ‘Non si cambia una virgola’, Il Sole 24 Ore, May 4, 2014, p. 26.
    Reprinted with revisions in [2:2017b], ‘Io sono così’ (also available in Chinese translation).

  157. 2014q, with Roberto Casati: ‘Due lingue, una sola logica’, Il Sole 24 Ore, April 27, 2014, p. 28.

  158. 2014p, with Roberto Casati: ‘Abbiamo tanti piccoli amici’, Il Sole 24 Ore, April 20, 2014, p. 26.

  159. 2014o, with Roberto Casati: ‘Se mi pizzichi scompari’, Il Sole 24 Ore, April 13, 2014, p. 26.
    Reprinted with revisions in [2:2017b], ‘Non pizzicarmi’ (also available in Chinese translation).

  160. 2014n, with Roberto Casati: ‘Autoreferenzialità, brutto vizio’, Il Sole 24 Ore, April 6, 2014, p. 26.
    Polish translation by Patrycja Mikulska: ‘Autoreferencyjność, brzydkie przyzwyczajenie’, in Marcin Iwanicki and Jacek Jarocki (eds.), 13 podróży filozoficznych. Przewodnik (nie tylko) Pascala, Lublin, Katolicki Uniwersytet Lubelski Jana Pawła II, 2017, pp. 18–19.

  161. 2014m, with Roberto Casati: ‘Il complotto del sonno rubato’, Il Sole 24 Ore, March 30, 2014, p. 28.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  162. 2014l, with Roberto Casati: ‘Pericolo! Cervelli infetti’, Il Sole 24 Ore, March 23, 2014, p. 26.
    Reprinted with revisions in [2:2017b], ‘Codice 121’ (also available in Chinese translation).

  163. 2014k, with Roberto Casati: ‘Ottetto palindromo perfetto’, Il Sole 24 Ore, March 16, 2014, p. 30.

  164. 2014j, with Roberto Casati: ‘Facciamo cifra tonda’, Il Sole 24 Ore, March 9, 2014, p. 28.

  165. 2014i, with Roberto Casati: ‘Che loop aggiornare la pagina’, Il Sole 24 Ore, March 2, 2014, p. 28.

  166. 2014h, with Roberto Casati: ‘Un matrimonio complicato’, Il Sole 24 Ore, February 23, 2014, p. 32.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  167. 2014g, with Roberto Casati: ‘Piccole famiglie crescono’, Il Sole 24 Ore, February 16, 2014, p. 30.

  168. 2014f, with Roberto Casati: ‘Cartine inutilmente vere’, Il Sole 24 Ore, February 9, 2014, p. 28.
    Reprinted with revisions in [2:2017b], ‘Voi non siete qui’ (also available in Chinese translation).

  169. 2014e, with Roberto Casati: ‘Storia di un nome innamorato’, Il Sole 24 Ore, February 2, 2014, p. 30.

  170. 2014d, with Roberto Casati: ‘Solo parole concrete, please’, Il Sole 24 Ore, January 26, 2014, p. 30.

  171. 2014c, with Roberto Casati: ‘Uno strano incentivo a nascere’, Il Sole 24 Ore, January 19, 2014, p. 28.
    Reprinted with revisions in [2:2017b], ‘Incentivo a nascere’ (also available in Chinese translation).

  172. 2014b, with Roberto Casati: ‘L’antonimo di sinonimo’, Il Sole 24 Ore, January 12, 2014, p. 30.

  173. 2014a, with Roberto Casati: ‘Lasciate un messaggio, richiameremo’, Il Sole 24 Ore, January 5, 2014, p. 26.
    Reprinted with revisions in [2:2017b], ‘Pregasi lasciare messaggio’ (also available in Chinese translation).

  174. 2013w', with Roberto Casati: ‘Due o tre cose impossibili da verificare’, Il Sole 24 Ore, December 29, 2013, p. 28.
    Reprinted with revisions in [2:2017b], ‘Verifiche impossibili’ (also available in Chinese translation).

  175. 2013v', with Roberto Casati: ‘Il mondo è un cinema realistico’, Il Sole 24 Ore, December 22, 2013, p. 26.

  176. 2013u', with Roberto Casati: ‘Agazzetta piena di anotizie’, Il Sole 24 Ore, December 15, 2013, p. 30.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  177. 2013t', with Roberto Casati: ‘Colpiti dal falso negativo’, Il Sole 24 Ore, December 8, 2013, p. 30.

  178. 2013s', with Roberto Casati: ‘Multa con margine di errore’, Il Sole 24 Ore, December 1, 2013, p. 30.

  179. 2013r', with Roberto Casati: ‘La macchina dell’esperienza’, Il Sole 24 Ore, November 24, 2013, p. 31.

  180. 2013q', with Roberto Casati: ‘Errori arbitrali concettuali’, Il Sole 24 Ore, November 10, 2013, p. 30.
    Reprinted with revisions in [2:2017b], ‘Errori arbitrali’ (also available in Chinese translation).

  181. 2013p', with Roberto Casati: ‘Manuale di matematica istantanea’, Il Sole 24 Ore, November 3, 2013, p. 30.
    Reprinted: November 17, 2013, p. 32.
    Reprinted with revisions in [2:2017b], ‘Voglio una vita approssimata’ (also available in Chinese translation).

  182. 2013o', with Roberto Casati: ‘Il mistero dei trisavoli mancanti’, Il Sole 24 Ore, October 27, 2013, p. 51.

  183. 2013n', with Roberto Casati: ‘La perla e lo squalo’, Il Sole 24 Ore, October 20, 2013, p. 53.

  184. 2013m', with Roberto Casati: ‘Piacere, sono un flippamondi’, Il Sole 24 Ore, October 6, 2013, p. 53.
    Reprinted with revisions in [2:2017b], ‘Il flippamondi’ (also available in Chinese translation).

  185. 2013l', with Roberto Casati: ‘La morte di Giulietta’, Il Sole 24 Ore, September 29, 2013, p. 54.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).
    Polish translation by Patrycja Mikulska: ‘Śmierć Julii’, Filozofuj!, October 23, 2017.

  186. 2013k', with Roberto Casati: ‘A chi appartiene il confine?’, Il Sole 24 Ore, September 22, 2013, p. 53.
    Reprinted with revisions in [2:2017b], ‘Brindisi al confine’ (also available in Chinese translation).

  187. 2013j', with Roberto Casati: ‘Stratagemma per una vittoria certa’, Il Sole 24 Ore, September 15, 2013, p. 53.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  188. 2013i', with Roberto Casati: ‘Indovina l’indovino infallibile’, Il Sole 24 Ore, September 8, 2013, p. 55.

  189. 2013h', with Roberto Casati: ‘Contagiati dall’assenza’, Il Sole 24 Ore, September 1, 2013, p. 45.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  190. 2013g', with Roberto Casati: ‘Proiezione abusiva’, Il Sole 24 Ore, August 25, 2013, p. 23.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  191. 2013f', with Roberto Casati: ‘Tra prua e poppa’, Il Sole 24 Ore, August 18, 2013, p. 25.
    Reprinted with revisions in [2:2017b], ‘La barca con due prue’ (also available in Chinese translation).

  192. 2013e', with Roberto Casati: ‘Perdita in pari’, Il Sole 24 Ore, August 11, 2013, p. 23.

  193. 2013d', with Roberto Casati: ‘Servono 86.400 orologi?’, Il Sole 24 Ore, August 4, 2013, p. 23.
    Reprinted with revisions in [2:2017b], ‘Ottantaseimilaquattrocento orologi’ (also available in Chinese translation).

  194. 2013c', with Roberto Casati: ‘Duecento secchiate per la vetta del Bianco’, Il Sole 24 Ore, July 28, 2013, p. 23.
    Reprinted with revisions in [2:2017b], ‘La vetta più alta’ (also available in Chinese translation).

  195. 2013b', with Roberto Casati: ‘Quale minaccia scegliere?’, Il Sole 24 Ore, July 14, 2013, p. 23.

  196. 2013a', with Roberto Casati: ‘La patente a punti ti ha salvato’, Il Sole 24 Ore, July 7, 2013, p. 23.

  197. 2013z, with Roberto Casati: ‘Il tempo cotto in padella’, Il Sole 24 Ore, June 30, 2013, p. 25.

  198. 2013y, with Roberto Casati: ‘Cosa vuol dire Sempre’, Il Sole 24 Ore, June 23, 2013, p. 29.
    Reprinted with revisions in [2:2017b], ‘Il lato nascosto’ (also available in Chinese translation).

  199. 2013x, with Roberto Casati: ‘Temponauti per forza’, Il Sole 24 Ore, June 16, 2013, p. 31.
    Polish translation by Patrycja Mikulska: ‘Temponauci z konieczności’, Filozofuj!, 7:1 (2016), p. 40.

  200. 2013w, with Roberto Casati: ‘Scorpione trasformato in scorpio’, Il Sole 24 Ore, June 9, 2013, p. 25.

  201. 2013v, with Roberto Casati: ‘Nulla, qualcosa, tutto’, Il Sole 24 Ore, June 2, 2013, p. 25.
    Polish translation by Patrycja Mikulska: ‘Nic, coś, wszystko’, Filozofuj!, 9:3 (2016), p. 42.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  202. 2013u, with Roberto Casati: ‘Ogni cosa al proprio posto’, Il Sole 24 Ore, May 26, 2013, p. 31.

  203. 2013t, with Roberto Casati: ‘Maltempo inglese’, Il Sole 24 Ore, May 19, 2013, p. 31.

  204. 2013s, with Roberto Casati: ‘Atti linguistici in rete’, Il Sole 24 Ore, May 12, 2013, p. 29.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  205. 2013r, with Maurizio Ferraris: ‘Meraviglie del possibile’, La Repubblica, May 9, 2013, pp. 52–53.

  206. 2013q, with Roberto Casati: ‘Lo specchio che riflette a posteriori’, Il Sole 24 Ore, May 5, 2013, p. 27.
    Polish translation by Patrycja Mikulska: ‘Lustro, które odbija z opóźnieniem’, Filozofuj!, 11:5 (2016), p. 45.
    Reprinted with revisions in [2:2017b], ‘Lo specchio che riflette in ritardo’ (also available in Chinese translation).

  207. 2013p, with Roberto Casati: ‘Il gioco della regola’, Il Sole 24 Ore, April 28, 2013, p. 29.
    Reprinted with revisions in [2:2017b], ‘La prima mossa’ (also available in Chinese translation).

  208. 2013o, with Roberto Casati: ‘La misura di tutte le cose’, Il Sole 24 Ore, April 21, 2013, p. 29.

  209. 2013n, with Roberto Casati: ‘Prima viene l’uovo’, Il Sole 24 Ore, April 14, 2013, p. 50.

  210. 2013m, with Roberto Casati: ‘Romanzo di o con immagini?’, Il Sole 24 Ore, April 7, 2013, p. 23.
    Reprinted with revisions in [2:2017b], ‘Senza parole’ (also available in Chinese translation).

  211. 2013l, with Roberto Casati: ‘Azzeriamo i nostri debiti’, Il Sole 24 Ore, March 31, 2013, p. 21.

  212. 2013k, with Roberto Casati: ‘Se non ci fosse il tredici’, Il Sole 24 Ore, March 24, 2013, p. 21.

  213. 2013j, with Roberto Casati: ‘Questioni di gusti e di logica’, Il Sole 24 Ore, March 17, 2013, p. 21.
    Reprinted with revisions in [2:2017b], ‘La logica del gusto’ (also available in Chinese translation).

  214. 2013i, with Roberto Casati: ‘Ecco a voi l’eterno ritorno’, Il Sole 24 Ore, March 3, 2013, p. 21.
    Polish translation by Patrycja Mikulska: ‘Przed nami wieczny powrót’, Filozofuj!, 8:2 (2016), p. 49.
    Reprinted with revisions in [2:2017b], ‘Eterno ritorno’ (also available in Chinese translation).

  215. 2013h, with Roberto Casati: ‘Prevedo tutto il possibile’, Il Sole 24 Ore, February 24, 2013, p. 21.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  216. 2013g, with Roberto Casati: ‘Il metro infallibile dell’ora’, Il Sole 24 Ore, February 17, 2013, p. 21.
    Reprinted with revisions in [2:2017b], ‘L’orologio infallibile’ (also available in Chinese translation).

  217. 2013f, with Roberto Casati: ‘Come viaggia un nodo’, Il Sole 24 Ore, February 10, 2013, p. 21.

  218. 2013e, with Roberto Casati: ‘Geometria senza parole’, Il Sole 24 Ore, February 3, 2013, p. 21.
    Reprinted with revisions in [2:2017b], ‘Deparolizzatore matematico’ (also available in Chinese translation).

  219. 2013d, with Roberto Casati: ‘Azioni senza motivo’, Il Sole 24 Ore, January 27, 2013, p. 21.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).
    Polish translation by Patrycja Mikulska: ‘Działania bez powodu’, Filozofuj!, November 3, 2022.

  220. 2013c, with Roberto Casati: ‘Quanto tempo per lo spazio’, Il Sole 24 Ore, January 20, 2013, p. 21.
    Reprinted with revisions in [2:2017b], ‘Quanto tempo per lo spazio?’ (also available in Chinese translation).

  221. 2013b, with Roberto Casati: ‘L’area del triangolo generico’, Il Sole 24 Ore, January 13, 2013, p. 21.

  222. 2013a, with Roberto Casati: ‘La musica che non ci è nuova’, Il Sole 24 Ore, January 6, 2013, p. 19.

  223. 2012h', with Roberto Casati: ‘Gli occhiali metafisici’, Il Sole 24 Ore, December 30, 2012, p. 19.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).
    Polish translation by Patrycja Mikulska: ‘Metafizyczne okulary’, Filozofuj!, November 4, 2020.

  224. 2012g', with Roberto Casati: ‘Il vero nome della Terra’, Il Sole 24 Ore, December 23, 2012, p. 21.

  225. 2012f': ‘Salviamo le note (a margine)’, La Repubblica, December 18, 2012, p. 59.

  226. 2012e', with Roberto Casati: ‘Bagnarsi nel fiume di Eraclito’, Il Sole 24 Ore, December 16, 2012, p. 23.

  227. 2012d', with Roberto Casati: ‘Navigatore utile da fermo’, Il Sole 24 Ore, December 9, 2012, p. 23.

  228. 2012c', with Roberto Casati: ‘Evvivano i tempi morti!’, Il Sole 24 Ore, December 2, 2012, p. 23.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  229. 2012b', with Roberto Casati: ‘Io parlo sempre meno’, Il Sole 24 Ore, November 25, 2012, p. 21.

  230. 2012a', with Roberto Casati: ‘La poesia è lingua rimusicata’, Il Sole 24 Ore, November 18, 2012, p. 23.

  231. 2012z, with Roberto Casati: ‘Kraitchik aprirebbe la busta?’, Il Sole 24 Ore, November 11, 2012, p. 21.

  232. 2012y, with Roberto Casati: ‘Impossibile mettere la sveglia’, Il Sole 24 Ore, October 28, 2012, p. 27.
    Coda: Il Sole 24 Ore, November 4, 2012, p. 21.
    Reprinted with revisions in [2:2017b], ‘La sveglia impossibile’ (also available in Chinese translation).

  233. 2012x, with Roberto Casati: ‘La Verità e l’ora legale’, Il Sole 24 Ore, October 21, 2012, p. 23.
    Reprinted with revisions in [2:2017b], ‘Ora illegale’ (also available in Chinese translation).

  234. 2012w, with Roberto Casati: ‘Meglio giocare a briscola’, Il Sole 24 Ore, October 14, 2012, p. 23.

  235. 2012v, with Roberto Casati: ‘Il mondo in un gooz e qualcosina’, Il Sole 24 Ore, October 7, 2012, p. 23.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  236. 2012u: ‘La guerra delle mappe’, La Repubblica, October 5, 2012, pp. 52–53.

  237. 2012t, with Roberto Casati: ‘Libretto di omissioni per l’uso’, Il Sole 24 Ore, September 30, 2012, p. 23.
    Reprinted with revisions in [2:2017b], ‘Omissioni per l’uso’ (also available in Chinese translation).

  238. 2012s, with Roberto Casati: ‘L’imputata è disumana: al bando!’, Il Sole 24 Ore, September 23, 2012, p. 23.

  239. 2012r, with Roberto Casati: ‘Come è difficile parlarsi’, Il Sole 24 Ore, September 16, 2012, p. 23.

  240. 2012q, with Roberto Casati: ‘Stato sociale, mica civile’, Il Sole 24 Ore, September 9, 2012, p. 23.

  241. 2012p, with Roberto Casati: ‘Ci sono menzogne relative’, Il Sole 24 Ore, September 2, 2012, p. 21.
    Reprinted with revisions in [2:2017b], ‘Menzogne relative’ (also available in Chinese translation).

  242. 2012o, with Roberto Casati: ‘I nomi dei numeri’, Il Sole 24 Ore, August 26, 2012, p. 21.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  243. 2012n, with Roberto Casati: ‘Il massimo vantaggio’, Il Sole 24 Ore, August 19, 2012, p. 23.

  244. 2012m, with Roberto Casati: ‘Il ladro pagante’, Il Sole 24 Ore, August 12, 2012, p. 23.
    Reprinted with revisions in [2:2017b] (also available in Chinese translation).

  245. 2012l, with Roberto Casati: ‘Divisione equa’, Il Sole 24 Ore, August 5, 2012, p. 21.

  246. 2012k, with Roberto Casati: ‘Diabolica tragedia’, Il Sole 24 Ore, July 29, 2012, p. 23.
    Reprinted with revisions in [2:2017b], ‘Tragedia profana’ (also available in Chinese translation).

  247. 2012j, with Roberto Casati: ‘Malintesi telepatici’, Il Sole 24 Ore, July 22, 2012, p. 25.

  248. 2012i: ‘Il confine dei confini’, La Repubblica, July 17, 2012, pp. 50–51.

  249. 2012h, with Roberto Casati: ‘L’orologio prudente’, Il Sole 24 Ore, July 15, 2012, p. 23.

  250. 2012g, with Roberto Casati: ‘Che ora è? Quando? E dove?’, Il Sole 24 Ore, July 8, 2012, p. 25.
    Coda: Il Sole 24 Ore, July 15, 2012, p. 22.
    Reprinted with revisions in [2:2017b], ‘Che ora è?’ (also available in Chinese translation).

  251. 2012f, with Roberto Casati: ‘L’inutile safety car’, Il Sole 24 Ore, July 1, 2012, p. 23.

  252. 2012e, with Roberto Casati: ‘Più veloce dell’ombra’, Il Sole 24 Ore, June 24, 2012, p. 31.

  253. 2012d, with Roberto Casati: ‘Meglio ottimi che perfetti’, Il Sole 24 Ore, June 17, 2012, p. 23.

  254. 2012c, with Roberto Casati: ‘Valutare il tempo rimasto’, Il Sole 24 Ore, June 10, 2012, p. 27.

  255. 2012b, with Roberto Casati: ‘Autoprocreazione’, Il Sole 24 Ore, June 3, 2012, p. 27.

  256. 2012a, with Roberto Casati: ‘Com’è strana l’Italia vista dal basso’, Il Sole 24 Ore, May 27, 2012, p. 19.

  257. 2010: ‘Aspettando i Tartari e il cielo sereno’, Il Sole 24 Ore, December 5, 2010, p. 6.

  258. 2006d: ‘Fate la guerra, ma soltanto per divertirvi’, Il Sole 24 Ore, December 31, 2006, p. 28.
    English version as ‘World of Virtual Warcraft’, Columbia Spectator, November 19, 2010, p. 4.
    Reprinted with revisions in [2:2017b], ‘Avatar’ (also available in Chinese translation).

  259. 2006c, with Maurizio Ferraris: ‘Dialogo tra Umberto Eco e la sua immagine’, Il Sole 24 Ore, October 22, 2006, p. 43.
    Albanian translation by Arjan Th. Kallço and Neli Naço: ‘Dialog mes Umberto Ekos dhe imazhittë tij në pasqyrë’, Gazeta 55, April 8, 2010, p. 16.

  260. 2006b: ‘Missione impossibile: trovare “punti fissi”’, Il Messaggero, May 11, 2006, p. 28.

  261. 2006a, with Roberto Casati: ‘Chi ha rotto questo vaso?’, Il Sole 24 Ore, March 5, 2006, p. 34.

  262. 2004d, with Luciano Coen: ‘Un ultimo rebus, prima di salutarci’, La Stampa, May 22, 2004, p. 26.

  263. 2004c, with Luciano Coen: ‘La Donna dello Stagno pensa dunque non è’, La Stampa, March 9, 2004, p. 26.
    Reprinted with revisions in [2:2017b], ‘La Donna dello Stagno’ (also available in Chinese translation).

  264. 2004b, with Luciano Coen: ‘Assolto, dunque colpevole’, La Stampa, February 22, 2004, p. 24.
    Reprinted with revisions in [2:2017b], ‘Causa persa’ (also available in Chinese translation).

  265. 2004a, with Luciano Coen: ‘Come sopravvivere al ventilatore fonetico’, La Stampa, January 2, 2004, p. 22.

  266. 2003o, with Luciano Coen: ‘Cara ameba ti scrivo’, La Stampa, December 2, 2003, p. 26.
    Reprinted with revisions in [2:2004], ‘L’ultimo caso del Presidente delle Amebe’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  267. 2003n, with Luciano Coen: ‘Come è corta ‘precipitevolissimevolmente’’, La Stampa, November 1, 2003, p. 24.
    Reprinted with revisions in [2:2017b], ‘Messaggi nascosti’ (also available in Chinese translation).

  268. 2003m, with Luciano Coen: ‘Il mio thermos, macchina del tempo’, La Stampa, October 8, 2003, p. 28.

  269. 2003l, with Luciano Coen: ‘Prigioniero in una stanza di specchi’, La Stampa, September 11, 2003, p. 26.
    Reprinted as ‘Libertà obbligata’ in Nazione Indiana (online publication), January 17, 2004.
    Reprinted with revisions in [2:2004], ‘Stanza 88’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    ~ Adapted into short film by Pierluca di Pasquale: Stanza 88, Rome, 2010 .
    ~ English version adapted into stage play by Natalie Glick as ‘Room 88’, Insurmountable Simplicities, All Gone Theatre Company, New York, 2010.
    ~ Portuguese version adapted into radio play by Lucas Pinton dos Santos et al. as ‘Quarto 88’, Caxias do Sul, XVIII Prêmio Expocom, 2011.

  270. 2003k, with Luciano Coen: ‘Il paradosso dell’acido universale’, La Stampa, August 27, 2003, p. 24.
    Reprinted with revisions in [2:2004], ‘Acido Universale’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  271. 2003j, with Luciano Coen: ‘Aiuto, c’è un libro che mi sta leggendo’, La Stampa, July 27, 2003, p. 22.

  272. 2003i, with Maurizio Ferraris: ‘Sui tavoli non ci piove’, Il Sole 24 Ore, July 20, 2003, p. 31.

  273. 2003h, with Luciano Coen: ‘Nessuno è troppo piccolo per essere ignorato’, La Stampa, June 21, 2003, p. 26.
    Reprinted with revisions in [2:2017b], ‘Difficile sottovalutare la pragmatica’ (also available in Chinese translation).

  274. 2003g, with Luciano Coen: ‘Il sommo poeta che plagiò il suo futuro’, La Stampa, May 13, 2003, p. 26.
    Reprinted with revisions in [2:2004], ‘L’artista da giovane’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    ~ English version adapted into stage play by Natalie Glick as ‘The Poet as a Young Man’, Insurmountable Simplicities, All Gone Theatre Company, New York, 2010.

  275. 2003f, with Luciano Coen: ‘Mi trapianto, dunque non sono più’, La Stampa, April 15, 2003, p. 26.
    Reprinted with revisions in [2:2004], ‘Trapianto di persona’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    ~ Portuguese version adapted into radio play by Bruno Di Giaimo Rosas et al. as ‘Transplante de pessoa’, Caxias do Sul, XVII Prêmio Expocom, 2010.

  276. 2003e, with Luciano Coen: ‘Detenuto in attesa di memoria’, La Stampa, March 27, 2003, p. 32.
    Reprinted with revisions in [2:2004], ‘Amnesia parziale’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  277. 2003d, with Luciano Coen: ‘L’extraterrestre ha sbagliato pianeta’, La Stampa, March 12, 2003, p. 24.

  278. 2003c, with Roberto Casati and Maurizio Ferraris: ‘Se il conto diventa una zucca’, Il Sole 24 Ore, March 9, 2003, p. 3.
    Reprinted as ‘Il paradigma dell’oggetto’ in Rescogitans (online publication), November 2005.

  279. 2003b, with Luciano Coen: ‘Ho un messaggio: basta coi messaggi’, La Stampa, February 21, 2003, p. 28.
    Reprinted with revisions in [2:2017b]; ‘Non mandate più messaggi’ (also available in Chinese translation).

  280. 2003a, with Luciano Coen: ‘Come è bello vivere con il gratta e perdi’, La Stampa, January 22, 2003, p. 26.
    Reprinted with revisions in [2:2004], ‘Il gioco del Lotto nella città di Rovesci’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  281. 2002r, with Luciano Coen: ‘Brindisi alla mezzanotte che non esiste’, La Stampa, December 31, 2002, p. 27.
    Reprinted with revisions in [2:2004], ‘Bollicine’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  282. 2002q, with Luciano Coen: ‘Per chi suona il campanaro’, La Stampa, December 13, 2002, p. 27.
    Reprinted in Ofakim / Orizzonti, 2:7, March 2003, pp. 96–98.
    Reprinted with revisions in [2:2004], ‘Missiva sul tempo da Valle Finale’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  283. 2002p, with Luciano Coen: ‘Nel cubo di granito, il David di Michelangelo’, La Stampa, October 18, 2002, p. 26.
    Reprinted with revisions in [2:2004], ‘La statua nascosta’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  284. 2002o, with Luciano Coen: ‘Penna scrive, cappuccio soffre’, La Stampa, September 25, 2002, p. 24.
    Reprinted with revisions in [2:2004], ‘Tracce d’inchiostro’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  285. 2002n: ‘Domando quindi penso’, La Stampa / Supplemento ttl, August 31, 2002, p. 1

  286. 2002m, with Luciano Coen: ‘Povero Eurostar per Rome: l’hanno soppresso’, La Stampa, August 29, 2002, p. 27.
    Reprinted with revisions in [2:2004], ‘Treno soppresso’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  287. 2002l, with Luciano Coen: ‘Noi siamo qui, cioè altrove’, La Stampa, July 27, 2002, p. 24.

  288. 2002k, with Luciano Coen: ‘Interessante, come te non c’è nessuno’, La Stampa, July 1, 2002, p. 26.
    Reprinted with revisions in [2:2004], ‘Interessante!’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  289. 2002j, with Luciano Coen: ‘Mangiare una brioche, che atto indescrivibile’, La Stampa, June 18, 2002, p. 29.
    Reprinted with revisions in [2:2004], ‘Holter monitor’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  290. 2002i, with Luciano Coen: ‘I soldi non si creano da soli’, La Stampa, May 28, 2002, p. 29.
    Reprinted in Il foglio, June 3, 2002, p.3.

  291. 2002h, with Luciano Coen: ‘Dalla signora in rosso al Papa, in tre passaggi’, La Stampa, May 9, 2002, p. 30.

  292. 2002g, with Luciano Coen: ‘Che cosa vuole la maggioranza?’, La Stampa, April 24, 2002, p. 27.
    Reprinted with revisions in [2:2004] (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  293. 2002f, with Luciano Coen: ‘Ho mal di testa, mi curi con una bugia’, La Stampa, April 6, 2002, p. 24.
    Reprinted with revisions in [2:2004], ‘Effetto placebo’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  294. 2002e: ‘’, La Stampa, March 19, 2002, p. 33.

  295. 2002d, with Luciano Coen: ‘Cercando il pelo nell’uovo di colomba’, La Stampa, March 5, 2002, p. 28.
    Reprinted with revisions in [2:2004], ‘Il Dizionario Intelligente’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  296. 2002c, with Luciano Coen: ‘Cara, viviamo l’attimo infinitamente palindromo’, La Stampa, February 20, 2002, p. 26.

  297. 2002b, with Luciano Coen: ‘Pop, bob, qoq: basta riflettere...’, La Stampa, January 23, 2002, p. 28.
    Reprinted with revisions in [2:2004], ‘Riflessioni’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  298. 2002a, with Luciano Coen: ‘Una Sacher stregata (o forse no)’, La Stampa, January 2, 2002, p. 23.
    Reprinted with revisions in [2:2004], ‘La torta stregata’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    ~ English version adapted into stage play by Natalie Glick as ‘Risky Cake’, Insurmountable Simplicities, All Gone Theatre Company, New York, 2010.

  299. 2001r, with Luciano Coen: ‘Complimenti per i terzi, se i primi sono geni’, La Stampa, December 15, 2001, p. 23.
    Reprinted with revisions in [2:2004], ‘Complimenti ai terzi’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  300. 2001q, with Luciano Coen: ‘Che fai tu opera d’arte in ciel... ’, La Stampa, November 24, 2001, p. 22.
    Reprinted with revisions in [2:2004], ‘I nuovi satelliti’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  301. 2001p: ‘Asimmetria: il disordine mondiale’, La Stampa, November 2, 2001, p. 25.

  302. 2001o, with Luciano Coen: ‘Anche la data di nascita è un’opinione’, La Stampa, October 16, 2001, p. 34.
    Reprinted with revisions in [2:2004], ‘Date di nascita’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  303. 2001n, with Luciano Coen: ‘Mancano le parole? C’è il Pittolibro’, La Stampa, September 29, 2001, p. 33.
    Reprinted with revisions in [2:2004], ‘Pittolibro per turisti’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  304. 2001m, with Luciano Coen: ‘Nell’isola del giorno dopo’, La Stampa, August 2, 2001, p. 24.
    Reprinted with revisions in [2:2004], ‘L’Isola delle Quattro Stagioni’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    Reprinted with revisions in Roberto Casati, Dov’è il sole di notte? Lezioni atipiche di astronomia, Milan, Cortina, 2013, pp. 70–72.

  305. 2001l, with Luciano Coen: ‘Il mondo è un buco con la gabbia intorno’, La Stampa, July 13, 2001, p. 26.
    Reprinted with revisions in [2:2004], ‘Hic sunt leones’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  306. 2001k, with Roberto Casati, Vittorio Girotto, and Michele Miozzo: ‘La ricerca non è un brevetto’, Il Sole 24 Ore, June 24, 2001, p. 9.

  307. 2001j, with Luciano Coen: ‘Verde come la fragola, rosa come il pistacchio’, La Stampa, June 15, 2001, p. 24.
    Reprinted with revisions in [2:2004], ‘I sapori del gelato’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  308. 2001i, with Luciano Coen: ‘Colpo di sole al Polo Nord’, La Stampa, June 6, 2001, p. 28.
    Reprinted with revisions in [2:2004], ‘Un viaggio annullato’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  309. 2001h, with Luciano Coen: ‘Per un pelo il capellone non è calvo’, La Stampa, April 28, 2001, p. 26.
    Reprinted as ‘Il circolo della vaghezza’ in Giangiacomo Gerla, Cosa può fare un calcolatore? Vol. II, Milan, IlMioLibro, 2013, pp. 167–169.

  310. 2001g, with Luciano Coen: ‘Compri uno, paghi due’, La Stampa, April 18, 2001, p. 26.
    Reprinted with revisions in [2:2004], ‘La credenza fatta a pezzi’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  311. 2001f, with Luciano Coen: ‘Il treno delle FS all’incontrario va...’, La Stampa, April 7, 2001, p. 26.
    Reprinted with revisions in [2:2017b], ‘Cambio di vettura’ (also available in Chinese translation),

  312. 2001e, with Luciano Coen: ‘Dai dadi al lotto, l’ordine non c’è ma si vede’, La Stampa, March 10, 2001, p. 24.
    Reprinted with revisions in [2:2004], ‘Il disordine invisibile’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    ~ Reprinted in Sophias, 1 (2008), 60–61.

  313. 2001d, with Luciano Coen: ‘Contropiede pertinente’, La Stampa, February 21, 2001, p. 22.
    English version as ‘May I Help You?’, The Blue and White, 7:4 (2001), pp. 114 and 125.
    Reprinted with revisions in [2:2004], ‘Alla lettera’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    ~ English version adapted into stage play by Natalie Glick as ‘Verbatim’, Insurmountable Simplicities, All Gone Theatre Company, New York, 2010.

  314. 2001c, with Luciano Coen: ‘Un giorno a doppio senso’, La Stampa, February 10, 2001, p. 24.

  315. 2001b, with Luciano Coen: ‘Destra e sinistra, unite per sempre’, La Stampa, January 31, 2001, p. 24.
    Reprinted with revisions in [2:2017b], ‘Destra o sinistra?’ (also available in Chinese translation).

  316. 2001a, with Luciano Coen: ‘Se io avessi imprevisto tutto questo...’, La Stampa, January 2, 2001, p. 15.
    Reprinted with revisions in [2:2004], ‘Una visita imprevedibile’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  317. 2000j, with Luciano Coen: ‘Segui le regole (anche se le ignori)’, La Stampa, December 9, 2000, p. 28.
    Reprinted with revisions in [2:2004], ‘La regola numero uno’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  318. 2000i, with Luciano Coen: ‘Bush, Gore e i buchi sulle schede’, La Stampa, November 19, 2000, p. 24.

  319. 2000h, with Luciano Coen: ‘La Signorina Standard sceglie il Presidente’, La Stampa, November 7, 2000, p. 28
    Reprinted as ‘Scelta obbligata’ in Rescogitans (online publication), December 2005.
    Reprinted with revisions in [2:2004], ‘Scelta obbligata’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  320. 2000g, with Luciano Coen: ‘Il modo migliore per vincere al lotto’, La Stampa, August 23, 2000, p. 24.
    Reprinted with revisions in [2:2004], ‘I numeri della fortuna’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  321. 2000f, with Luciano Coen: ‘Sonnifero Zombie Spa’, La Stampa, August 17, 2000, p. 23
    Reprinted with revisions in [2:2004] (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).
    ~ English version adapted into stage play by Natalie Glick as ‘Zombie Sleeping Pills’, Insurmountable Simplicities, All Gone Theatre Company, New York, 2010.
    Reprinted as ‘Coscienza, spuma della mente’ in Il Sole 24 Ore, July 29, 2007, p. 39.

  322. 2000e, with Luciano Coen: ‘Una borsa di Studio per il giovane Hitler’, La Stampa, August 3, 2000, p. 18.
    Reprinted with revisions in [2:2004], ‘Di un progetto inutile’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  323. 2000d, with Luciano Coen: ‘L’angelo della domanda perfetta’, La Stampa, June 23, 2000, p. 24.

  324. 2000c, with Luciano Coen: ‘Dialogo dell’amor platonico che non fa tredici’, La Stampa, June 13, 2000, p. 26.
    Reprinted with revisions in [2:2004], ‘Fila tredici’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  325. 2000b: ‘Filosofia dell’autogol’, La Stampa, March 7, 2000, p. 25.
    Reprinted with revisions in [2:2004], ‘La catena che conduce in porta’ (with translations into English, French, Spanish, Portuguese, Greek, Polish, Finnish, Korean, and Chinese).

  326. 2000a: ‘Gli errori del New York Times’, La Stampa, January 5, 2000, p. 22.

  327. 1999: ‘L’ultimo giorno dispari della nostra vita’, La Stampa, November 30, 1999, p. 27.
    Reprinted in Il foglio, December 6, 1999, p.3.

  328. 1998: ‘L’altra faccia della metafisica’, Il Sole 24 Ore, May 24, 1998, p. 35.
    English version as [7:1999].

  329. 1991: ‘Intelligenza o artificio?’, L’Adige, 17 September 1991, pp. 24–25.

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9. Translations

  1. 2019: English translation of Paolo Bozzi, ‘La corrente della coscienza ovvero i fatti sotto osservazione’ [Teorie & Modelli, 2:1 (1985), 5–38]: ‘The Stream of Consciousness, or the Events under Observation’, in Ivana Bianchi and Richard Davies (eds.), Paolo Bozzi’s Experimental Phenomenology, London, Routledge, 2019, pp. 81–103.

  2. 2008: Italian translation of Curt John Ducasse, ‘On the Nature and the Observability of the Causal Relation’ [The Journal of Philosophy, 23:3 (1926), 57–68], Sections II–IV: ‘Sulla natura della relazione causale’, in Achille C. Varzi (ed.), Metafisica. Classici contemporanei, Rome, Laterza, 2008, pp. 418–424.

  3. 1983: Italian translation of Andrew Radford, Transformational Syntax. A Student’s Guide to Chomsky’s Extended Standard Theory [Cambridge, Cambridge University Press, 1981]: La sintassi trasformazionale. Introduzione alla teoria standard estesa di Chomsky, Bologna, Il Mulino, xiv + 524 pp.

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Last Revised: January 18, 2024