Descartes has a Clarity First epistemology: (i) Clarity is a primitive (indefinable) phenomenal quality: the appearance of truth. (ii) Clarity is prior to other qualities: obscurity, confusion, distinctness – are defined in terms of clarity; epistemic goods – reason to assent, rational inclination to assent, reliability, and knowledge – are explained by clarity. (This is the first of two companion entries; the sequel is called, "Descartes's Method for Achieving Knowledge.").

À partir de l’indécision apparente du concept de substance dans le corpus cartésien, on formule l’hypothèse que le « traité de la substance » des Principia I peut jeter une lumière sur les Meditationes (§ 1) ; en effet les Principia I développent deux définitions de la substance, tantôt comme chose existante par soi, tantôt comme support des attributs (§ 2) ; or ces deux définitions correspondent exactement aux deux lieux des Meditationes mobilisant la substance : la Meditatio III recourt (...) à la substance des Principia I, 51, et la Meditatio VI recourt à la substance des Principia I, 52 (§ 3). On en déduit que le cogito de la Meditatio II ne saurait remonter de l’attribut principal à la substance suivant la logique de Principia I, 52 (§ 4) et que l’ ego, alors entendu selon Principia I, 51, ne pouvait que perdre sa substantialité dès l’instant que se trouvait exhibée sa dépendance envers Dieu, à la fin de la Meditatio III (§ 5). Dès lors, les Principia nous paraissent trancher des indécisions cartésiennes avec une certaine efficacité (§ 6). (shrink)

Descartes’s meditator thinks that if she does not know the existence of God, she cannot be fully certain of anything. This statement seems to contradict the cogito, according to which the existence of I is indubitable and therefore certain. Cannot an atheist be certain that he exists? Atheistic knowledge has been discussed almost exclusively in relation to mathematics, and the more interesting question of the atheist’s certainty of his existence has not received the attention it deserves. By examining the question (...) of atheistic knowledge in relation to the cogito, I articulate the advantage Descartes sees in having knowledge of God. I challenge a long-held reading of the cogito where “I exist” is the first full certainty and argue that while atheistic cogito is more certain than atheistic knowledge in mathematics, it cannot be a starting point for lasting and stable science, because science requires knowing the existence of the non-deceiving God. (shrink)

This paper concerns the three great modal dichotomies: (i) the necessary/contingent dichotomy; (ii) the a priori/empirical dichotomy; and (iii) the analytic/synthetic dichotomy. These can be combined to produce a tri-dichotomy of eight modal categories. The question as to which of the eight categories house statements and which do not is a pivotal battleground in the history of analytic philosophy, with key protagonists including Descartes, Hume, Kant, Kripke, Putnam and Kaplan. All parties to the debate have accepted that some categories are (...) void. This paper defends the contrary view that all eight categories house statements—a position I dub ‘octopropositionalism’. Examples of statements belonging to all eight categories are given. (shrink)

From a number of quarters have come attempts to answer some form of skepticism—about knowledge of the external world, freedom of the will, or moral reasons—by showing it to be performatively self-defeating. Examples of this strategy are subject to a number of criticisms, in particular the criticism that they fail to shift the burden of proof from the anti-skeptical position, and so fail to establish the epistemic entitlement they seek. To these approaches I contrast one way of understanding Kant’s core (...) anti-skeptical arguments in the Critique of Pure Reason. Kant’s goal is the more modest one of showing the applicability of the concepts of substance and cause to experience, against those who might call such application incoherent, or a category mistake. I explain why this goal makes Kant’s approach more promising than those of neo-Kantian practitioners of otherwise structurally-similar strategies. (shrink)

Статтю присвячено дослідженню альтернативних можливостей інтерпретації Декартової концепції cogito: як авто-референтної структури і як авто-афекційності. Контекстом аналізу виступає трансцендентально-феноменологічний ракурс погляду на картезіанську філософію як на засновок трансцендентального мотиву. Визначено роль принципу авто-референтності в трансцендентальному дискурсі. На ґрунті розгляду перспектив тлумачення картезіанського підходу, запропонованих М. Анрі й Ж.-Л. Марйоном, виявлено моменти іррелевантності авто-афекційної настанови вимогам трансцендентального мислення і втомивовано адекватність авто-референтної моделі його засадам. Авторка доходить висновку, що, попри позірну пріоритетність авто-афекційності для трансцендентального дискурсу, пов’язану насамперед з притаманною їй радикалізацією (...) функціонального аспекту свідомості й усуненням небезпеки субстантивації cogito, закладеної в структурі авто-референтності, остання видається відповіднішою вимогам трансцендентального мислення, оскільки передбачає збереження принципу відношення-відмінності, конститутивного для трансцендентальної думки – який в умовах авто-афекційності виявляється редукованим. (shrink)

Semen Frank (1877–1950) was one of the first and most ardent advocates of the ontological argument in the twentieth century. He proposed an original interpretation of the ontological argument based on its analogy to Descartes’ Cogito. Frank believed that it is possible to develop Cogito ergo sum into Cogito ergo est ens absolutum. In this paper, I analyze his version of the ontological argument. First, I propose a simple reconstruction of his reasoning, paying attention to its hidden premise. Second, departing (...) from the classical logical interpretations of Descartes’ argument, I show that for Frank the claim that God exists had the same logical properties as Cogito. As a result, it seems that his argument was formally correct, though based on a premise which could hardly be convincing for a non-believer. This should not be surprising, however, since Frank, as most Russian religious philosophers, was not interested in the project of philosophical theology. His main concern was rather the development of philosophy based on religious premises, which might be called “theological philosophy”. (shrink)

ABSTRACT: René Descartes' Cogito is an example of a paradigmatic thought experiment, herald of both subjectivism and new science in Europe's Modern Age, that seems to have escaped the attention of thought experiment philosophers. On deep analysis, the Cogito appears as universal instantiation. The Cogito has strong rhetorical effects for it narratively generalizes from I to all human kind, and its historical and philosophical success can be explained from its concise enthymematic structure that rings true in many possible senses. We (...) consider it a preeminent example of a thought experiment as it states the power of thinking as its very contents. From Descartes' methodology of doubt we can conclude that, e.g., on a Wittgensteinian interpretation, the Cogito is a logical thought experiment rather than a psychological one. RESUMO: O Cogito de René Descartes é um exemplo de experimento mental paradigmático, precursor tanto do subjetivismo quanto da nova ciência, na Idade Moderna europeia, o qual parece ter escapado à atenção dos filósofos que estudaram o experimento mental. Na análise profunda, o Cogito aparece como uma instanciação universal. O Cogito tem fortes efeitos retóricos por si mesmo, generalizando narrativamente desde o eu para toda a espécie humana, e seu sucesso histórico e filosófico pode ser explicado por sua estrutura entimemática concisa, que soa através de muitos sentidos possíveis. Consideramos que é um exemplo proeminente de um experimento mental, na medida em que afirma o poder de pensar como seus próprios conteúdos. A partir da metodologia da dúvida de Descartes, podemos concluir que, em uma interpretação wittgensteiniana, o Cogito é um experimento mental mais lógico que psicológico. (shrink)

Le « cogito, ergo sum » cartésien apparaît depuis quarante ans comme « inférence et performance » (J. Hintikka). Mais de quelle inférence s'agit-il précisément ? Pour le savoir, cet article poursuit deux objectifs : d'abord, montrer que la question pertinente à laquelle il s'agit de répondre ne concerne pas la relation logique interne qui lie le cogito au sum, et qui est une intuition, mais celle, externe, qui lie le « cogito, ergo sum » tout entier au « quicquid (...) cogitat, est ». Ensuite, montrer que cette dernière relation est tout à la fois une induction et une déduction. (shrink)

As a unique method of philosophical argument, performative contradiction attracted general attention after the change in direction of pragmatics in the twentieth century. Hintikka used this method to conduct an in-depth analysis of Descartes’ proposition “I think, therefore I am,” providing a proof which is a model in the philosophical history; Apel absorbed performative contradiction into his own framework of a priori pragmatics; and Habermas introduced it into the theory of formal pragmatics and rendered it an effective weapon of debate. (...) Wittgenstein, who had fallen into the trap of performative contradiction in Tractatus Logico-Philosophicus, later managed to extract himself from it and indeed used the methodology of performative contradiction to cure the ills of philosophy, making it a general philosophical method. Through analysis of its connotations and classic examples of its use we can see that it is crucial in refuting extreme relativism and skepticism, and hence provides methodological support for a new foundation for philosophical paradigms. (shrink)

Le cogito cartésien a fait l’objet de critiques essentielles de la part de Kant et Husserl : Descartes aurait substantialisé, réifié et mondanisé le cogito au lieu de la saisir dans sa pureté transcendantale. Nous faisons ici retour aux textes cartésiens, afin de déterminer si ces critiques sont légitimes ou si la pensée cartésienne a davantage anticipé la pensée transcendantale que ne l’estimaient Kant et Husserl.