"Le Proslogion de Saint Anselme de Cantorbéry - l'œuvre la plus célèbre d'un des premiers et des plus grands philosophes du moyen âge - a joué dans l'histoire de la philosophie médiévale et moderne un rôle de tout premier plan. Il contient, en effet, ce fameux argument, dit..." ontologique ", qui - fortune à nulle autre pareille - sema la division et la discorde parmi les philosophes et les théologien". Alexandre Koyré, Introduction au Proslogion.

In a previous article on cosmological arguments, I have put forward a few examples of complete infinite and circular explanations, and argued that complete non-wellfounded explanations such as these might explain the present state of the world better than their well-founded theistic counterparts (Billon, 2021). Although my aim was broader, the examples I gave there implied merely causal explanations. In this article, I would like to do three things: • Specify some general informative conditions for complete and incomplete non-wellfounded causal (...) explanations that can be used to assess candidate explanations and to generate new examples of complete non-wellfounded explanations. • Show that these conditions, which concern chains of causal explanations, easily generalize to chains of metaphysical, grounding explanations and even to chains involving other “determination relations” such as supervenience. • Apply these general conditions to the recent debates against the existence of nonwellfounded chains of grounds and show, with a couple of precise examples, that the latter can be complete, and that just like in the case of causal explanations, non-wellfoundedness can in fact be an aset rather than a liability. (shrink)

Patients suffering from the Cotard syndrome can deny being alive, having guts, thinking or even existing. They can also complain that the world or time have ceased to exist. In this article, I argue that even though the leading neurocognitive accounts have difficulties meeting that task, we should, and we can, make sense of these bizarre delusions. To that effect, I draw on the close connection between the Cotard syndrome and a more common condition known as depersonalisation. Even though they (...) are not delusional, depersonalised patients seem to have experiences that are quite similar to those of Cotard patients. I argue that these experiences are essentially characterised by a lack of subjective character and of two other structural features of experience, which I call ‘the present character’ and ‘the actual character’. Cotard's nihilistic delusions simply consist in taking these anomalous experiences at face value. (shrink)

Patients suffering from depersonalization complain of feeling detached from their body, their mental states, and actions or even from themselves. In this chapter, I argue that depersonalization consists in the lack of a phenomenal feature that marks my experiences as mine, which is usually called “mineness,” and that the study of depersonalization constitutes a neglected yet incomparable probe to assess empirically the scope, role, and even the nature of mineness. Here is how I will proceed. After describing depersonalization (§2) and (...) arguing that it involves a lack of mineness (§3) I will confront a series of objections (§4). I will then spell out what depersonalization can teach us about the scope of mineness (§5), about its role and psychological function (§6) and even about its nature (§7). (shrink)

(2013). Does consciousness entail subjectivity? The puzzle of thought insertion. Philosophical Psychology: Vol. 26, No. 2, pp. 291-314. doi: 10.1080/09515089.2011.625117.

Consider an infinite series whose items are each explained by their immediate successor. Does such an infinite explanation explain the whole series or does it leave something to be explained? Hume arguably claimed that it does fully explain the whole series. Leibniz, however, designed a very telling objection against this claim, an objection involving an infinite series of book copies. In this paper, I argue that the Humean claim can, in certain cases, be saved from the Leibnizian “infinite book copies” (...) objection, and that this provides an interesting way to defuse some cosmological arguments for the existence of God and to give a non-theistic but complete explanation of the Universe. In the course of my argumentation, I also show that circular explanations can be “self-explanatory” as well: explaining two items by each other can explain the couple of items tout court. (shrink)

According to what we will call subjectivity theories of consciousness, there is a constitutive connection between phenomenal consciousness and subjectivity: there is something it is like for a subject to have mental state M only if M is characterized by a certain mine-ness or for-me-ness. Such theories appear to face certain psychopathological counterexamples: patients appear to report conscious experiences that lack this subjective element. A subsidiary goal of this chapter is to articulate with greater precision both subjectivity theories and the (...) psychopathological challenge they face. The chapter’s central goal is to present two new approaches to defending subjectivity theories in the face of this challenge. What distinguishes these two approaches is that they go to great lengths to interpret patients’ reports at face value – greater length, at any rate, than more widespread approaches in the extant literature. (shrink)

Descartes was certain that he was thinking and he was accordingly certain that he existed. Like Descartes, we seem to be more certain of our thoughts and our existence than of anything else. What is less clear is the reason why we are thus certain. Philosophers throughout history have provided different interpretations of the cogito, disagreeing both on the kind of thoughts it characterizes and on the reasons for its cogency. According to what we may call the empiricist interpretation of (...) the cogito, I can only claim to be certain of having experiences, and this certainty, as well as that of my own existence, stems from their phenomenal and subjective character. According to rationalist interpretations, on the other hand, I am certain of having some self-reflexive propositional attitudes, and this certainty derives from their rational features. Psychiatric patients suffering from acute forms of depersonalization or of the Cotard syndrome often doubt that they think and exist, and might even believe that they don't. I argue that their study allows us to favor the empiricist interpretation of the cogito. (shrink)

Basic self-awareness is the kind of self-awareness reflected in our standard use of the first-person. Patients suffering from severe forms of depersonalization often feel reluctant to use the first-person and can even, in delusional cases, avoid it altogether, systematically referring to themselves in the third-person. Even though it has been neglected since then, depersonalization has been extensively studied, more than a century ago, and used as probe for understanding the nature and the causal mechanisms of basic self-awareness. In this paper, (...) I argue that depersonalized patients indeed have an impaired basic self-awareness, and that their study allows us both to favor one specific theory of basic self-awareness and to understand what is wrong with its rivals. According to the favored theory, which I call Cartesian, we are basically self-aware in virtue of being acquainted with ourselves through introspection. (shrink)

Basic self-awareness is the kind of self-awareness reflected in our standard use of the first-person. Patients suffering from severe forms of depersonalization often feel reluctant to use the first-person and can even, in delusional cases, avoid it altogether, systematically referring to themselves in the third-person. Even though it has been neglected since then, depersonalization has been extensively studied, more than a century ago, and used as probe for understanding the nature and the causal mechanisms of basic self-awareness. In this paper, (...) I argue that depersonalized patients indeed have an impaired basic self-awareness, and that their study allows us both to favor one specific theory of basic self-awareness and to understand what is wrong with its rivals. According to the favored theory, which I call Cartesian, we are basically self-aware in virtue of being acquainted with ourselves through introspection. (shrink)

Most paradoxes of self-reference have a dual or ‘hypodox’. The Liar paradox (Lr = ‘Lr is false’) has the Truth-Teller (Tt = ‘Tt is true’). Russell’s paradox, which involves the set of sets that are not self-membered, has a dual involving the set of sets which are self-membered, etc. It is widely believed that these duals are not paradoxical or at least not as paradoxical as the paradoxes of which they are duals. In this paper, I argue that some paradox’s (...) duals or hypodoxes are as paradoxical as the paradoxes of which they are duals, and that they raise neglected and interestingly different problems. I first focus on Richard’s paradox (arguably the simplest case of a paradoxical dual), showing both that its dual is as paradoxical as Richard’s paradox itself, and that the classical, Richard-Poincaré solution to the latter does not generalize to the former in any obvious way. I then argue that my argument applies mutatis mutandis to other paradoxes of self-reference as well, the dual of the Liar (the Truth-Teller) proving paradoxical. (shrink)

Motivationally unconscious (M-unconscious) states are unconscious states that can directly motivate a subject’s behavior and whose unconscious character typically results from a form of repression. The basic argument for M-unconscious states claims that they provide the best explanation to some seemingly non rational behaviors, like akrasia, impulsivity or apparent self-deception. This basic argument has been challenged on theoretical, empirical and conceptual grounds. Drawing on recent works on apparent self-deception and on the ‘cognitive unconscious’ I assess those objections. I argue that (...) (i) even if there is a good theoretical argument for its existence, (ii) most empirical vindications of the M-unconscious miss their target. (iii) As for the conceptual objections, they compel us to modify the classical picture of the M-unconscious. I conclude that M-unconscious states and processes must be affective states and processes that the subject really feels and experiences —and which are in this sense conscious— even though they are not, or not well, cognitively accessible to him. Dual process psychology and the literature on cold-hot empathy gaps partly support the existence of such M-unconscious states. (shrink)

Ttler=‘Ttler is true’ says of itself that it is true. It is a truth-teller. I argue that we have equally telling arguments (i) to the effect that all truth-tellers must have the same truth-value (ii) and the effect that truth-tellers differ in truth-value. This is what I call the Truth-Tellers paradox. This paradox stems from the fact that the truth-value of a truth-teller like Ttler should be determined by the fact that it says of itself that it is true (which (...) entails (i)) but that it cannot be determined by that fact (as witnessed by (ii)). The Truth-Tellers paradox resem- bles the classical semantic paradoxes like the Liar. In both cases, a form of self-reference allows us to derive a contradiction from oth- erwise plausible semantic and logical principles. Furthermore the Truth-Tellers paradox can be formulated without using sentences which are in an intuitive sense ungrounded, it thus severs the link, almost universally taken for granted, between the semantic para- doxes and ungroundedness. Finally, some classical solutions to the Liar do not generalize to the Truth-Tellers paradox. (shrink)

Many philosophers regard the persistence of philosophical disputes as symptomatic of overly ambitious, ill-founded intellectual projects. There are indeed strong reasons to believe that persistent disputes in philosophy (and more generally in the discourse at large) are pointless. We call this the pessimistic view of the nature of philosophical disputes. In order to respond to the pessimistic view, we articulate the supporting reasons and provide a precise formulation in terms of the idea that the best explanation of persistent disputes entails (...) that they are pointless. We then show how to answer the pessimistic argument. Taking a well-known mathematical controversy as our paradigm example, we argue that some persistent disputes reflect substantive disagreements at the “meta-analytic” level, i.e., disagreements about the best way, among quite different candidates, to understand the topic at issue, and the best associated cluster of analytic truths one should accept concerning it. Moreover, our concrete example shows that such meta-analytic disagreements can in principle be settled and yield a genuine theoretical (as opposed to merely pragmatic) breakthrough. We conclude optimistically that persistent disputes can be an important means of fostering epistemic progress. (shrink)

We examine how Frege’s contrast between identity judgments of the forms “a=a” vs. “a=b” would fare in the special case where ‘a’ and ‘b’ are complex mental representations, and ‘a’ stands for an introspected ‘I’-thought. We first argue that the Fregean treatment of I-thoughts entails that they are what we call “one-shot thoughts”: they can only be thought once. This has the surprising consequence that no instance of the “a=a” form of judgment in this specific case comes out true, let (...) alone a priori true. This further reinforces Glezakos’s objections against the set-up of Frege’s puzzle, while also raising what we think is an acute problem for Fregeans, insofar as I-thought (and indexical thinking more generally), understood in their way, turns out to be incompatible with some basic features of rationality. (shrink)

The famous middle Byzantine alchemical manuscript Marcianus graecus 299 contains annotations from the late Byzantine period, most prominently in its opening quire. This article examines a text on the very first page of the manuscript, a text written in a late Byzantine Greek script, but in a language other than Greek. A number of words in this undeciphered text can be correlated with Arabic technical vocabulary that would also have been used in other Islamicate languages such as Persian and Ottoman (...) Turkish. Certain features such as accentuation on the final syllables of words make Turkish or Persian the most likely candidates. (shrink)

Le sentiment du sublime est une expérience de la nature qui nous fait prendre conscience de la place paradoxale que nous occupons dans le cosmos et provoque par ce biais un plaisir ambivalent. Selon la théorie classique, kantienne, cette expérience proviendrait d’une sorte de combat de catch mental, dont on perdrait les premiers rounds en laissant la nature déborder nos sens, mais que l’on finirait par remporter grâce à la puissance de notre raison et de notre liberté. On n’aurait d’expérience (...) de sublime, toujours selon cette théorie, que face à des objets naturels dignes d’être (mentalement) combattus, des choses immenses ou terriblement puissantes comme le ciel étoilé, les montagnes ou les ouragans. Je prétends dans cet article que la théorie classique dépend d’une conception de la nature que nous ne pouvons pas trouver crédible aujourd’hui (une conception, très sommairement, agonistique et anthropocentrée) et qui la discrédite. Corrélativement, elle se trompe quant à l’objet du sublime, qui peut être une chose relativement petite comme un arbre ou même, peut-être, une brindille oscillant dans le vent. Je propose une théorie alternative du sublime qui repose sur une forme de décentrement empathique dans la nature, fût-elle indifférente et sauvage, plutôt que sur un combat mental contre elle. (shrink)

Recension du livre de François Kammerer, Conscience et Matière, Éditions matériologiques, 2019.

Cet article aborde le problème de la justification des attributions d'expérience à autrui (problem of other minds). Je compare ce problème à d'autres problèmes sceptiques contemporains dus à Nelson Goodman et Saoül Kripke et je montre qu'il constitue un défi plus pressant et auquel il est plus difficile de répondre de manière modeste. Je propose une solution radicale à ce problème, qui repose sur l'idée, avérée empiriquement, selon laquelle nous disposons de deux formes d'empathie distinctes pour accéder à autrui. Très (...) sommairement, lorsque je m'interroge sur autrui de manière objective et désengagée, je ne peux accéder à son esprit que par empathie cognitive, et le problème des autres esprits est alors insoluble. Lorsqu'autrui m'est présenté en personne, par contre, j'accède à son esprit par une forme d'empathie affective et le problème de l'esprit autrui est alors littéralement dépourvu de sens. (shrink)

Dans cet article, je propose d’examiner un aspect relativement méconnu de la philosophie de l’art de Nelson Goodman, à savoir sa théorie de la variation, succinctement exposée dans Reconceptions en philosophie (Goodman & Elgin, 1988). Si la variation est un procédé courant dans les arts, son fonctionnement reste difficile à cerner. Goodman défend qu’il s’agit d’une opération sémiotique et référentielle complexe : la variation implique l’exemplification de caractéristiques partagées et constrastées, ainsi qu’une référence de la variation au thème via ces (...) caractéristiques exemplifiées. Comme je le défends ici, cette théorie de la variation peut s’appliquer de manière fructueuse au jeu vidéo. La variation y est non seulement plus fréquente et saillante que dans d’autres formes artistiques, mais fournit même une clé de compréhension du medium vidéoludique. Elle préside à la création des jeux vidéo, à leur fonctionnement, à l’activité ludique, et finalement à la valeur épistémique et hédonique du jeu. Le jeu vidéo peut donc être foncièrement compris comme un art de la variation, où il s’agit essentiellement d’explorer et d’épuiser des variations autour d’un même thème. (shrink)

Les douze contributions qui composent l’ouvrage portent sur ce que L. Brisson et O. Renaut ont choisi de dénommer une « érotique » platonicienne, autrement dit « cet ensemble systématique de discours et de pratiques où eros intervient » (p. 8), une érotique qui prend forme à travers une série d’ « indices » disséminés dans les dialogues plutôt qu’elle ne se présente comme une « théorie » en bonne et due forme (p. 9). La spécificité de l’ouvrage tient à (...) la politisation de cette érotique. L’ «... (shrink)

The advent of the Web is one of the defining technological events of the twentieth century, yet its impact on the fundamental questions of philosophy has not yet been explored, much less systematized. The Web, as today implemented on the foundations of the Internet, is broadly construed as the space of all items of interest identified by URIs. Originally a space of linked hypertext documents, today the Web is rapidly evolving as a universal platform for data and computation. Even swifter (...) is the Web-driven transformation of many previously unquestioned philosophical concepts of privacy, belief, intelligence, cognition, and even embodiment in surprising ways. The ensuing essays in this collection hope to explore the philosophical foundation of the World Wide Web and open the debate on whether or not the changes caused by the Web to technology and society warrant the creation of a philosophy of the Web. (shrink)

This article examines the dedicatory epigram of the earliest and most important witness to the Greek alchemical corpus, the tenth-century manuscript donated by Cardinal Bessarion to the Republic of Venice, Biblioteca Nazionale Marciana MS gr. 299, as a window onto the cultural coordinates of the manuscript’s middle Byzantine readers. Scrutiny of the epigram’s meter, language, literary conventions, and the handwriting of the scribe who copied it into the manuscript point to a tenth-century date not only for the manuscript but also (...) for the epigram itself and make it possible to situate the epigram, and with it the alchemical manuscript that contains it, within the mainstream of middle Byzantine elite culture. (shrink)

La métaphysique est l’affirmation de la priorité de l’Être sur la puissance. En toutes ses variations stratégiques, elle retient la pensée dans la prison de l’égalité à soi. Après la physique qui n’a pu arrêter la pensée à la seule évidence sensible, la métaphysique produit les catégories réflexives d’une présence désormais reconnue jusque dans les fondements mêmes de sa représentation rationnelle. Un même désir, une même sève irrigue tout l’arbre de l’Être. Sous le tronc de la physique, les...

This article investigates several discussions of “chemistry,” understood as an analysts’ category referring to theories and practices dealing with the structure and transformation of matter. By reading these texts (a treatise defending kīmiyāʾ by al-Fārābī, the famous passage from Ibn Sīnā’s Shifāʾ on transmutation, Ibn Taymiyyah’s fatwā against kīmiyāʾ, Michael Psellos’s treatise On Making Gold, and the same author’s Accusation against a sitting Patriarch of Constantinople), the article aims to lay the groundwork for integrating the historiography of Byzantine and Arabic (...) alchemy into a wider western Eurasian intellectual history. (shrink)

Originally published in English in 1973. This volume traces the development of the revolution which so drastically altered manâes view of the universe in the sixteenth and seventeenth centuries. The "astronomical revolution" was accomplished in three stages, each linked with the work of one man. With Copernicus, the sun became the centre of the universe. With Kepler, celestial dynamics replaced the kinematics of circles and spheres used by Copernicus. With Borelli the unification of celestial and terrestrial physics was completed by (...) abandonment of the circle in favour the straight line to infinity. (shrink)

Kurt Lewin's essay “Gesetz und Experiment in der Psychologie” of 1927, published in this issue of SiC for the first time in English translation, and his “Der Übergang von der aristotelischen zur galileischen Denkweise in Biologie und Psychologie” of 19311 have together contributed most to shape his image as a metatheorist of psychology. A careful examination of what has occasionally been called the “Lewinian tradition,”2 however, reveals that Lewin's metascientific contributions have been much more influential in Europe than in the (...) United States, where he lived and taught as a Jewish refugee from 1934 until his early death on 2 February, 1947. (shrink)

The study of eye movements is a common way to non-invasively understand and analyze human behavior. However, eye-tracking techniques are very hard to scale, and require expensive equipment and extensive expertise. In the context of web browsing, these issues could be overcome by studying the link between the eye and the computer mouse. Here, we propose new analysis methods, and a more advanced characterization of this link. To this end, we recorded the eye, mouse, and scroll movements of 151 participants (...) exploring 18 dynamic web pages while performing free viewing and visual search tasks for 20 s. The data revealed significant differences of eye, mouse, and scroll parameters over time which stabilize at the end of exploration. This suggests the existence of a task-independent relationship between eye, mouse, and scroll parameters, which are characterized by two distinct patterns: one common pattern for movement parameters and a second for dwelling/fixation parameters. Within these patterns, mouse and eye movements remained consistent with each other, while the scrolling behaved the opposite way. (shrink)

Nous voudrions ici montrer comment l’histoire des idées croise l’histoire des sciences et des techniques – plus précisément : l’histoire de la critique de la science et de la technique, ou de la critique de la modernité technique. Nous essaierons, avec plusieurs exemples, d’esquisser une typologie d’histoire des idées dans ce domaine – et dans notre pratique. Nous conclurons en indiquant que cette histoire des idées et des concepts nous paraît plus que jamais nécessaire dans le contexte contemporain de surmédiatisation (...) de certains termes, en association avec celle de certains auteurs ou de certains mouvements. (shrink)

There has been a great deal of interest in medieval action theory in recent years. Nonetheless, relatively little work has been done on figures prior to the so-called High Middle Ages, and much of what has been done has focused on better-known thinkers, such as Augustine and Anselm. By comparison, Bernard of Clairvaux's treatise, De gratia et libero arbitrio has been neglected. Yet his treatise is quoted widely by such important scholars as Philip the Chancellor, Alexander of Hales, and (...) Albertus Magnus. Some historians of philosophy argue that his writings inspired the voluntarist movement that developed in the 1270s. Thus, Bernard must be seen as an important influence upon later medieval theories of action. In this paper, I examine the basic structure of his interesting account of human action and its freedom and conclude by raising some further issues connected to his work. /// Nos últimos anos assistiu-se a uma retoma do interesse pela teoria medieval da acção. Apesar disso, poucos estudos têm versado sobre os pensadores anteriores à assim chamada Alta Idade Média, para além de que esses estudos se debruçam sobretudo sobre os filósofos mais conhecidos, como é o caso de Agostinho e de Anselmo. Comparativamente, o tratado de S. Bernardo de Claraval, De gratia et libero arbítrio, não tem suscitado muita atenção crítica. Contudo, numerosos pensadores citaram este tratado, entre eles Filipe o Chanceler, Alexandre de Hales, e Alberto Magno. Vários histonadores da filosofia têm avançado a tese de que os escritos de Bernardo influenciaram o movimento voluntarista que se desenvolveu nos anos 1270. Nesse sentido, as ideias de Bernardo de Claraval tiveram um certo impacto sobre as teorias da acção que haveriam de aparecer mais tarde. No presente artigo, a autora examina as ideias do pensador medieval sobre a acção humana e a sua liberdade, terminando com o levantar de algumas novas questões sobre o tratado de Bernardo de Claraval. (shrink)

Les innombrables interprétations de l’allégorie de la caverne, aussi réduc­trices ou spéculatives, aussi fidèles à la lettre ou à l'esprit du texte soient-elles, paraissent s'effacer les unes les autres, comme balayées par la souplesse d'un texte qui autorise les lectures les plus élémentaires comme les plus raffinées. Cet "étrange tableau" qu'expose Socrate s'insère immé­dia­tement entre deux pôles d'intelligibilité censés en assurer la compréhension : l'image de la ligne au...

Le futur est un thème clé des pères fondateurs des sciences sociales. Marx, Durkheim, Weber abordent la question du Progrès et des évolutions de long terme des sociétés. Ces travaux mettent fin au monopole de la métaphysique sur le futur et ouvrent la porte aux premières enquêtes.Aujourd’hui, il est possible d’utiliser les méthodes des sciences sociales pour participer de manière renouvelée à l’exploration du futur, en s’attachant aux visions non expertes. Pour ce faire, quelle meilleure entrée que celle de la (...) mobilité spatiale? Elle est une activité quotidienne et un symbole du Progrès, au travers des innovations techniques qui ont accompagné son essor lors des deux derniers siècles.Afin d’interroger les visions profanes du futur par le biais de la mobilité spatiale, 53 entretiens qualitatifs ont été conduits. Les résultats obtenus permettent de comprendre les visions du futur de la mobilité et les formes d’évolution du temps qui habitent les individus contemporains, qu’elles soient progressistes, fatalistes, ou bien rhizomatiques. Ces visions concernent le réchauffement climatique, la fin du pétrole et de la voiture. Par le biais de ces visions profanes, l’enquête couvre ainsi les enjeux les plus saillants des sociétés contemporaines. (shrink)

Infinitary languages are used to prove that any strong isomorphism of substructures of isomorphic structures can be extended to an isomorphism of the structures. If the structures are models of a theory that has quantifier elimination, any isomorphism of substructures is strong. This theorem is a partial generalization of Steinitz’s theorem for algebraically closed fields and has as special case the analogous theorem for differentially closed fields. In this note, we announce results which will be proved elsewhere. DOI: 10.5007/1808-1711.2011v15n1p107.

En 1785, Alexander Cozens publie un court traité, un manuel à l’usage des jeunes peintres les invitant à utiliser la tache et le hasard comme préalable à la composition de paysages. En 1969, Jean Messagier élabore une technique, « le Gel », pour parfaire un certain nombre de ses compositions. Cet article s’articule autour d’une mise en perspective de ces deux expériences. Il vise à porter un regard sur les rapports que l’art du paysage entretient avec l’abstraction, avant même qu’elle (...) n’existe ou au cœur de son plein épanouissement et propose de réfléchir à l’utilité ou la vacuité d’un tel débat. Il brosse une histoire rapide de l’utilisation de la tache et du hasard dans l’histoire de la création et enfin, il présente la position singulière de Jean Messagier au sein de l’histoire de la peinture abstraite et propose d’engager une étude plus fine de l’œuvre de ce dernier. (shrink)