In lieu of an abstract, here is a brief excerpt of the content:Virtual GalleryCarlo Zei Click for larger view View full resolutionFigure 1. Click for larger view View full resolutionFigure 2. Click for larger view View full resolutionFigure 3. Click for larger view View full resolutionFigure 4. Click for larger view View full resolutionFigure 5. Click for larger view View full resolutionFigure 6. Click for larger view View full resolutionFigure 7. Click for larger view View full resolutionFigure 8.Carlo Zei (...) took these photographs at Forte Belvedere in Florence, at the seaside at Forte dei Marmi, and in Prato. He is a PhD candidate in Comparative Literature at Cornell University and has published a few short works of fiction.Mario Ceroli’s sculptures are reproduced by kind permission of the artist.Copyright © 1997 The Johns Hopkins University Press... (shrink)

Facts happen at every interaction, but they are not absolute: they are relative to the systems involved in the interaction. Stable facts are those whose relativity can effectively be ignored. In this work, we describe how stable facts emerge in a world of relative facts and discuss their respective roles in connecting quantum theory and the world. The distinction between relative and stable facts resolves the difficulties pointed out by the no-go theorem of Frauchiger and Renner, and is consistent with (...) the experimental violation of the Local Friendliness inequalities of Bong et al.. Basing the ontology of the theory on relative facts clarifies the role of decoherence in bringing about the classical world and solves the apparent incompatibility between the ‘linear evolution’ and ‘projection’ postulates. (shrink)

These are lectures prepared for a series of seminars I am invited to give at Princeton’s Philosophy Department in November 2024.

Relational quantum mechanics (RQM) is an interpretation of quantum mechanics based on the idea that quantum states do not describe an absolute property of a system but rather a relationship between systems. There have recently been some criticisms of RQM pertaining to issues around intersubjectivity. In this article, we show how RQM can address these criticisms by adding a new postulate which requires that all of the information possessed by a certain observer is stored in physical variables of that observer (...) and thus is accessible by measurement to other observers. This makes it possible for observers to reach intersubjective agreement about quantum events that have occurred in the past. We suggest a possible ontology for a version of RQM employing this postulate; this ontology upholds the principle that quantum states are always relational, but it also postulates a set of quantum events that are not strictly relational. We show that the new postulate helps address the preferred basis problem in RQM. (shrink)

Individual relativism, also known as ethical subjectivism, is an attractive theory about morality. It argues that morality is a matter relative to the individual in a way akin to personal taste. For example, subjectivists regard the ethical judgment ‘Stealing is wrong’ as comparable with the judgment of taste ‘I dislike Brussels sprouts’. Yet, subjectivism is not nihilism. While nihilism denies the existence of moral value, duties, principles and truths, subjectivism claims that they exist, but they are subjective like taste. In (...) this paper, I argue that ethical subjectivism ought to be rejected as it is an incoherent, undefendable, and a pernicious position. (shrink)

The Heythrop Journal, Volume 63, Issue 5, Page 869-885, September 2022.

Why do we remember the past and not the future? What does it mean for time to "flow"? Do we exist in time or does time exist in us? In lyric, accessible prose, Carlo Rovelli invites us to consider questions about the nature of time that continue to puzzle physicists and philosophers alike. For most readers this is unfamiliar terrain. We all experience time, but the more scientists learn about it, the more mysterious it remains. We think of it (...) as uniform and universal, moving steadily from past to future, measured by clocks. Rovelli tears down these assumptions one by one, revealing a strange universe where at the most fundamental level time disappears. He explains how the theory of quantum gravity attempts to understand and give meaning to the resulting extreme landscape of this timeless world. Weaving together ideas from philosophy, science and literature, he suggests that our perception of the flow of time depends on our perspective, better understood starting from the structure of our brain and emotions than from the physical universe. (shrink)

The author deals with the lost works of Empedocles, an often neglected subject, in the frame of the discussion concerning the number of the poems and their main features. He reviews the traces of the Passage of Xerxes, of the Medical Discourse, and of the Proem to Apollo among the fragments and witnesses, taking his cue from textual aspects and dealing with the contents, the significance of each of these writings in Empedocles’ culture and thought and their multifarious relationships with (...) his times. As to the Passage, he tries to reconcile the contrasting interpretations so far proposed (historical or religious poem). Concerning B111, the only relic from the Medical Discourse, he explains why its contents are incompatible with the Physical Poem and the Purifications. He analyzes the Proem to Apollo in several perspectives (text, witnesses, contents also from the epistemological point of view, literary genre). He assigns fragments 131–134 and 142 to the Proem, drawing one of his arguments from the comparison with the third Homeric Hymn to Apollo, and also suggesting a relationship with an intellectual cult of the sun. Formal features help to ascribe each fragment to the relevant poem. Close similarities between fragments do not necessarily mean that they come from the same writing: Empedocles is wont to allude to one poem of his while composing another. The author concludes that the striving for a reductio ad unum of the Acragantine’s output, also evident in the attempt by a number of scholars to make only one poem out of the Περὶ φύσεως and the Καθαρμοί, has often led researchers to take for granted that none of the fragments preserved might belong to the lost works. (shrink)

As a response to the semantic and logical paradoxes, theorists often reject some principles of classical logic. However, classical logic is entangled with mathematics, and giving up mathematics is too high a price to pay, even for nonclassical theorists. The so-called recapture theorems come to the rescue. When reasoning with concepts such as truth/class membership/property instantiation, (These are examples of concepts that are taken to satisfy naive rules such as the naive truth schema and naive comprehension, and that therefore are (...) compatible with a solution to paradox cast in the logics considered below. Other notions of similar kind can be added to the list.) if one is interested in consequences of the theory that only contain mathematical vocabulary, nothing is lost by reasoning in the nonclassical framework. This article shows that this claim is highly misleading, if not simply false. Under natural assumptions, some well-established approaches to recapture are incorrect. (shrink)

Résumé Leo Strauss achève sa formation intellectuelle dans une Allemagne où le sionisme est une réalité consolidée et où le phénomène du « retour » ( teshuvah ) au judaïsme distingue une large partie de la jeunesse judéo-allemande, qui est insatisfaite du statut juif dans la modernité. Cet essai vise à identifier le parcours philosophique et politique du jeune Strauss qui, à partir de la crise de modernité caractéristique de la culture de Weimar, se démarque de celui de tous les (...) auteurs (Cohen, Rosenzweig, Buber, Scholem etc.) et mouvements juifs (Wissenschaft des Judentums, sionisme politique, sionisme culturel, sionisme religieux etc.) du début du xxe siècle en Allemagne. (shrink)

Quantum gravity poses the problem of merging quantum mechanics and general relativity, the two great conceptual revolutions in the physics of the twentieth century. The loop and spinfoam approach, presented in this book, is one of the leading research programs in the field. The first part of the book discusses the reformulation of the basis of classical and quantum Hamiltonian physics required by general relativity. The second part covers the basic technical research directions. Appendices include a detailed history of the (...) subject of quantum gravity, hard-to-find mathematical material, and a discussion of some philosophical issues raised by the subject. This fascinating text is ideal for graduate students entering the field, as well as researchers already working in quantum gravity. It will also appeal to philosophers and other scholars interested in the nature of space and time. (shrink)

Choice can be defined in thermodynamical terms, and shown to have a thermodynamic cost: choosing between a binary alternative at temperature T dissipates an energy $$E\ge kT\ln 2$$.

According to Bohmian mechanics, we see the particle, not the pilot wave. But to make predictions we need to know the wave. How do we learn about the wave to make predictions, if we only see the particle? I show that the puzzle can be solved, but only thanks to decoherence.

A passage from Michael of Ephesus’ Commentary on the Nicomachean Ethics, book V (p. 50, 6–10 Hayduck), gives some information on the Anonymous Commentary on the Nicomachean Ethics, books II–IV. Michael cites a series of ancient annotations to the third book, written by ancient exegetes and which have come down to him. It can therefore be assumed that Michael had the Anonymous Commentary in front of him when he wrote these lines. It is thus possible to assume that it was (...) Michael of Ephesus himself who organised the entire commentary on the Nicomachean Ethics and inserted the Anonymous Commentary on Books II-IV after Eustratius’ commentary on Book I and before his own commentary on Book V. (shrink)

L’article présente une brève histoire de l’interprétation évolutionniste des traités d’Aristote à partir de la tendance évolutionniste de Jaeger. Il se concentre surtout, en premier lieu, sur la naissance et le développement des interprétations dialectiques des traités aristotéliciens à partir des années soixante du XX e siècle et, en second lieu, sur les critiques adressées à cette tendance par les interprètes contemporains du début du XXI e siècle. La section finale propose une approche alternative : selon cette interprétation, Aristote ne (...) renonce pas, y compris dans ses Éthiques, à la recherche de la définition. Dans l’ Éthique à Nicomaque, il parvient à définir les principaux concepts et phénomènes moraux en suivant la méthode permettant de fonder les définitions qui est décrite dans les Seconds Analytiques, livre II. Cela n’exclut pas que la méthode « dialectique » ou « endoxale » ait un certain rôle dans l’ Éthique à Nicomaque. (shrink)

The past decades have seen a growing “philosophical” interest in a number of authors, but strangely enough Saramago’s oeuvre has been left somewhat aside. This volume aims at filling this gap by providing a diverse range of philosophical perspectives and expositions on Saramago’s work. The chapters explore some possible issues arising from his works: from his use of Plato’s allegory of the cave to his re-readings of Biblical stories; from his critique and “reinvention” of philosophy of history to his allegorical (...) exploration of alternative histories; from his humorous approach to our being-towards-death to the revolutionary political charge of his fiction. The essays here confront Saramago’s fiction with concepts, theories, and suggestions belonging to various philosophical traditions and philosophers including Plato, Pascal, Kierkegaard, Freud, Benjamin, Heidegger, Lacan, Foucault, Patočka, Derrida, Agamben, and Žižek. (shrink)

In his 1956 book ‘The Direction of Time’, Hans Reichenbach offered a comprehensive analysis of the physical ground of the direction of time, the notion of physical cause, and the relation between the two. I review its conclusions and argue that at the light of recent advances in physics Reichenbach analysis provides the best account for the physical underpinning of these notions. I integrate results in cosmology, and on the physical underpinning of records and agency into Reichenbach’s account, and discuss (...) which questions it leaves open. (shrink)

The paper examines the epistemological significance of the expe- rience of estrangement caused by some types of descriptions of objects and phenomena. It shows how, today, the main productive matrix of these descriptions is formed by natural science. A distinction is drawn between a reductionist and pluralist approach to the aspect of estrangement offered by science, and subsequently analysed. The paper then puts forward an argument in support of the latter attitude.