This paper explicates Descartes’ theory of intuition (intuitus). Departing from certain commentators, I argue that intuition, for Descartes, is a form of clear and distinct intellectual perception. Because it is clear and distinct, it is indubitable, infallible, and provides a grade of certain knowledge he calls ‘cognitio’. I pay special attention to why he treats intuition as a form of perception, and what he means when he says it is ‘clear and distinct’. Finally, I situate his view in relation to (...) those of his Scholastic predecessors on one hand and current theories on the other. His view anticipates the contemporary ‘perceptual model of intuition’, though it is much bolder with its promise of certainty. (shrink)

It is a standing temptation for philosophers to find anticipations of their own views in the great thinkers of the past, but few have been so bold in the search for precursors, and so utterly mistaken, as Berkeley when he claimed Plato and Aristotle as allies to his immaterialist idealism. InSiris: A Chain of Philosophical Reflexions and Inquiries Concerning the Virtues of Tar-Water, which Berkeley published in his old age in 1744, he reviews the leading philosophies of antiquity and finds (...) them on the whole a good deal more sympathetic to his own ideas than the ‘modern atheism’, as he calls it, of Hobbes and Spinoza or the objectionable principles of ‘the mechanic and geometrical philosophers’ such as Newton. But his strongest and, I think, his most interesting claim is that neither Plato nor Aristotle admitted ‘an absolute actual existence of sensible or corporeal things’. (shrink)

This paper argues for a novel solution to the Cartesian Circle by emphasising the important epistemic role of the Second Meditation and Descartes’ faculty epistemology. I argue that, for Descartes: doubt requires a ‘good reason’ to doubt ; whether a reason qualifies as a ‘good reason’ depends on which faculty produces that reason ; and for distinct metaphysical perceptions from the faculty of the intellect, no other faculty can provide ‘good reasons’ to doubt. The upshot of §2 is that the (...) doubts raised up to the Third Meditation do not apply to the distinct metaphysical perceptions of the intellect, and in particular do not apply to the premises of the proof of the existence of God. I present the role of God as primarily to secure clear and distinct perceptions beyond the intellect, and knowledge of conclusions when those conclusions are no longer being clearly and distinctly perceived. Finally, I give an account of Descartes’ use of ‘ cognoscere ’, ‘ scire ’, and ‘ scientia ’ as three distinct epistemic levels, providing a valuable structure within which one can see the meditator progress. (shrink)

How does Descartes characterize the peculiar way in which each of us is aware of our bodies? I argue that Descartes recognizes a sense of bodily ownership, such that the body sensorily appears to be one's own in bodily awareness. This sensory appearance of ownership is ubiquitous, for Descartes, in that bodily awareness always confers a sense of ownership. This appearance is confused, in so far as bodily awareness simultaneously represents the subject as identical to, partially composed by, and united (...) to her body, without distinguishing these relations. Finally, the appearance of ownership is grounded in multiple other ways in which the body sensorily appears: namely, in the fact that the body appears to be inescapable, modified by bodily sensations, and an object of special concern. (shrink)

Many critics, Descartes himself included, have seen Hobbes as uncharitable or even incoherent in his Objections to the Meditations on First Philosophy. I argue that when understood within the wider context of his views of the late 1630s and early 1640s, Hobbes's Objections are coherent and reflect his goal of providing an epistemology consistent with a mechanical philosophy. I demonstrate the importance of this epistemology for understanding his Fourth Objection concerning the nature of the wax and contend that Hobbes's brief (...) claims in that Objection are best understood as a summary of the mechanism for scientific knowledge found in his broader work. Far from displaying his confusion, Hobbes's Fourth Objection in fact pinpoints a key weakness of Descartes's faculty psychology: its unintelligibility within a mechanical philosophy. (shrink)

Recent Cartesian scholarship postulates two Descartes, separating Descartes into a scientist and a metaphysician. The purpose varies, but one has been to show that the metaphysical Descartes, of the Meditations, is less genuine than the scientific Descartes. Accordingly, discussion of God and the soul, the evil demon, and the non-deceiving God were elements of rhetorical strategy to please theologians, not of serious philosophical argumentation. I agree in finding two Descartes, but the two I identify are not scientist and philosopher, but (...) practitioner and methodologist of the mathematical sciences on the one hand, and metaphysician of a new, general science of nature on the other. This chapter examines the transition to the second Descartes, and especially the metaphysical turn. It proposes that although Descartes' doubt was methodological and he felt no serious threat from skepticism and absolute certainty was not his primary goal. Rather, the doubt was used to reform the intellect, or to teach the use of the pure intellect (and to obtain certainty in that domain). Further, Descartes' metaphysics was primarily in the service of his natural philosophy (where in the main he did not claim absolute certainty). He did not talk about God and the soul in order to fool the theologians. His discussion of the relation between God and human reason was part of a metaphysical strategy in which, through his doctrine on the eternal truths, he separated knowledge of the first principles of natural philosophy (gained by the natural light) from theological cognition (through the light of grace), thereby seeking to render his metaphysics distinct from the proper domain of theology. (shrink)

In this paper, I provide what I believe to be Descartes's own solution to the problem of the Cartesian Circle. As I argue, Descartes thinks he can have certain knowledge of the premises of the Third Meditation proof of God's existence and veracity (i.e., the 3M-Proof) without presupposing God's existence. The key, as Broughton (1984) once argued, is that the premises of the 3M-Proof are knowable by the natural light. The major objection to this "natural light" gambit is that Descartes (...) identifies the natural light with the faculty of clear and distinct perception, a faculty that cannot be known to be reliable in advance of the 3M-Proof. I explain that Descartes distinguishes between three kinds of clear and distinction perceptions depending on their source; the senses, the imagination, or the intellect. I claim that although the First Meditation is designed to cast doubt on the clear and distinct perceptions of the senses and of the imagination, it is not designed to cast doubt on the clear and distinct perceptions of the intellect. The "natural light" gambit relies on the assumption that the natural light, by which propositions can be certainly known without presupposing knowledge of God's existence, is to be identified with the faculty of *intellectual* clear and distinct perception. (shrink)

Serious work in history of philosophy requires doing something very difficult: conducting a hypothetical dialogue with dead philosophers. Is it worth devoting to it the time and energy required to do it well? Yes. Quite apart from the intrinsic interest of understanding the past, making progress toward solving philosophical problems requires a good grasp of the range of possible solutions to those problems and of the arguments which motivate alternative positions, a grasp we can only have if we understand well (...) philosophy's past. Philosophers who concentrate too much on the present are apt to assume too simple a view of alternative theories and of important philosophical arguments. Ryle and Austin offer instructive examples of how it is possible to go wrong by ignoring or misrepresenting historical figures. (shrink)

This article offers an interpretation of Descartes’s method of doubt. It wields an examination of Descartes’s pedagogy—as exemplified by The Search for Truth as well as the Meditations—to make the case for the sincerity (as opposed to artificiality) of the doubts engendered by the First Meditation. Descartes was vigilant about balancing the need to use his method of doubt to achieve absolute certainty with the need to compensate for the various foibles of his scholastic and unschooled readers. Nevertheless, Descartes endeavored (...) to instill willful, context-independent, universal doubt across his readership. If all goes well, readers of the Meditations are like method actors; the Meditator is the character they are meant to bring to life, via the method of meditating on reasons for doubt. The article concludes with the suggestion that Descartes was the same kind of skeptic as the early Academic skeptics Arcesilaus and Carneades. (shrink)

It is a standing temptation for philosophers to find anticipations of their own views in the great thinkers of the past, but few have been so bold in the search for precursors, and so utterly mistaken, as Berkeley when he claimed Plato and Aristotle as allies to his immaterialist idealism. InSiris: A Chain of Philosophical Reflexions and Inquiries Concerning the Virtues of Tar-Water, which Berkeley published in his old age in 1744, he reviews the leading philosophies of antiquity and finds (...) them on the whole a good deal more sympathetic to his own ideas than the ‘modern atheism’, as he calls it, of Hobbes and Spinoza or the objectionable principles of ‘the mechanic and geometrical philosophers’ such as Newton. But his strongest and, I think, his most interesting claim is that neither Plato nor Aristotle admitted ‘an absolute actual existence of sensible or corporeal things’. (shrink)

The modem rationalist tradition initiated by Descartes has as one of its central tenets the independence of the human understanding from the senses. Regardless of the different ways in which independence from experience is understood, there is much common ground among the modem views on the a priori. Yet Kant, culminating this tradition, introduces an entirely new conception of the a priori never before articulated in the history of philosophy. This is the notion of elements in knowledge which are independent (...) of experience but nevertheless closely connected, in a special way, with experience.Although for Kant the a priori has a privileged position in the structure of knowledge - as it has for other modem rationalist philosophers - one of the most striking, and often neglected, aspect of his conception of the a priori is the great extent to which it is opposed to foundationalism. (shrink)

What are we to make of the cogito (cogito ergo sum) today, as the walls of Cartesian philosophy crumble around us? The enduring foundation of the cogito is consciousness. It is in virtue of a particular phenomenological structure that an experience is conscious rather than unconscious. Drawing on an analysis of that structure, the cogito is given a new explication that synthesizes phenomenological, epistemological, logical, and ontological elements. What, then, is the structure of conscious thinking on which the cogito draws? (...) What kind of certainty does the experience of thinking give one about one's thinking and about one's existence? What form of inference is the cogito, and what is the source of its validity and soundness? Does the cogito itself lead to an ontology of mind and body like Descartes's dualism? The discussion begins with Descartes's own careful formulations of some of these issues. Then the cogito is parsed into several different principles, the phenomenological principle emerging as basic. In due course the analysis sifts through Husserl's epistemology, Hintikka's logic (or pragmatics) of the cogito, and Kaplan's logic of demonstratives, as these bear specifically on the cogito. (shrink)

This journal article has been superseded by a revised version, published in the collection _Essays on the Philosophy and Science of Rene Descartes_, ed. by Stephen Voss (Oxford University Press, 1993), 259–287.

ABSTRACTIn answering the circularity charge, Descartes consistently distinguished between truths whose demonstrations we currently perceive clearly and distinctly and truths whose demonstrations we merely remember having perceived clearly and distinctly. Descartes uses C-truths to prove God’s existence, thus validating R-truths. While avoiding one form of circularity, this introduces another circle, for Descartes believes that God’s existence validates R-truths even when itself an R-truth. I consider Newman and Nelson’s grounds enhancement strategy according to which this problem is solved when God’s existence (...) is rendered axiomatic. I argue that since it is still possible to doubt axioms when not directly apprehending them, this strategy cannot work; having to reproduce the argument for God’s existence in face of sceptical doubt is unavoidable. Drawing both on Newman and Nelson’s notion of grounds enhancement and on repr... (shrink)

In this article, I consider Descartes’ enigmatic claim that we must assert that the material world is indefinite rather than infinite. The focus here is on the discussion of this claim in Descartes’ late correspondence with More. One puzzle that emerges from this correspondence is that Descartes insists to More that we are not in a position to deny the indefinite universe has limits, while at the same time indicating that we conceive a contradiction in the notion that the universe (...) has a limit. I reject one attempt to resolve this apparent conflict which appeals to Descartes’ admission to More that divine omnipotence requires that God can create a vacuum in nature, and focus instead on his response to More’s claim that this omnipotence requires the possibility of a completion of the division of matter that results in atoms. Finally, I distinguish Descartes’ indefinite from two other kinds of infinity with which it might well be confused. The first is an essentially incomplete ‘potential infinity’ that Descartes discusses in the Third Meditation, and the second is the sort of quantitative infinity that Leibniz – contrary to Descartes – denies can constitute a completed whole. (shrink)

Children and individuals with developmental disabilities compared to typical participants are disadvantaged not only by virtue of being vulnerable to risks inherent in research participation but also by the higher likelihood of exclusion from research altogether. Current regulatory and ethical guidelines although necessary for their protection do not sufficiently ensure fair distributive justice. Yet, in view of disproportionately higher burdens of co-occurring physical and mental disorders in individuals with DD, they are better positioned to benefit from research by equitable participation. (...) Greater elucidation of this ethical dilemma is called for by researchers, institutional review boards, and funding agencies to urgently redress the imbalance. This article discusses many of the regulatory principles to ensure better research participation of children and individuals with DD: human rights, validity, distributive justice, beneficence/nonmaleficence, and autonomy. (shrink)

Purpose of the article is to reconstruct the ideological and philosophical context in which Descartes actualizes the phenomenon of man and the task of refuting scepticism. A precondition for its implementation is attention to the explication of the peculiarities of reception by researchers of scepticism and the doctrine of doubt; delineation of the semantic implications of the anthropological intention of philosophizing and the boundaries of doubt. Theoretical basis. I base my view of Descartes’ legacy on the conceptual positions of phenomenology, (...) existentialism and hermeneutics. Originality. Based on the tendency of anthropologization of Descartes’ basic project, I refute the widespread tendency to qualify Descartes’ position as a sceptic, which is based on superficial stereotypes about the impersonality of his philosophy. The modern reception of the thinker’s texts indicates the priority for him of the task of explicating the conditions of man’s realization of his own vocation in the Universe, which is supplemented by the idea of the limits of science and the doubt correlative to it. Accordingly, Descartes’ refutation of scepticism appears in the form of concern for the creation of favourable conditions for human self-development, which implies a restrained attitude to the spheres of morality and religion. Conclusions. The author based on his own interpretation of the philosophical searching of the thinker attempted to rehabilitate Descartes’ position on scepticism. An appeal to the texts of the French philosopher shows that doubt is for him a means of creating conditions for the representation of the human in man. A deeper meaningful clarification of the method chosen by Descartes to refute scepticism involves appeal to the will and practical mastery of a new system of semantic coordinates of life. (shrink)

RésuméLa critique kantienne de la psychologie rationnelle est une expérience de pensée visant ni un individu ni une école, mais une tendance de la raison humaine à « hypostasier » la condition intellectuelle suprême d'une connaissance quelconque (le « Je pense ») en connaissance du « moi ». Cette tendance implique une circularité qui est également la cible des critiques transcendantales bien plus familières qui visent Locke et Hume. De même qu'un nouveau type de cercle (dit « de niveau »), (...) cet article propose une conception des arguments transcendantaux différente de celle présupposée dans la plupart des débats contemporains sur l'empirisme, le naturalisme et le fondationnalisme cartésien. (shrink)

This article is an attempt to answer the question whether Descartes had read Sextus Empiricus’s Outlines of Pyrrhonism. At first glance, the question seems trivial. This question, however, is of historico-philosophical significance in that it reveals, even if only partially, what Descartes, who is regarded as the father of early modern philosophy, inherited from his earlier intellectual legacy in formulating his own philosophy. I first compare statements from Sextus’s Outlines with corresponding statements from Descartes’s writings to identify their similarities in (...) terms of content. This comparison focuses on their views regarding four subjects: the syllogistic, moral guidelines, the use of definitions, and true opinions. I then analyse and discuss whether the degree of similarity between these sets of statements is sufficient to conclude that the particular work of Descartes is based on Sextus’s arguments. This preliminary study can only provide indirect evidence that Descartes had read Sextus, for a thorough clarification of whether he read anything other than the works he himself stated that he had read (e.g., Cicero, Suárez), would require further circumstantial evidence, however weak it may be. (shrink)

Descartes’ version of the Cosmological Argument in the Third Meditation is usually considered a failure, not because its conclusion doesn't follow from its premises, but because the truth of two of its premises is doubtful. One of these premises is that the objective reality of an idea is derived from a cause in which there is at least as much formal reality; the other, that only a being that possesses the qualities normally attributed to God could be responsible for the (...) idea of God. Typically there are two objections made in response to the first of these premises. First, we don't understand the concepts of formal and objective reality well enough to know whether or not the premise commands our assent. (shrink)

In this essay I argue that one of the things that matters most to Descartes' account of mind is that we use our minds actively. This is because for him only an active mind is able to re-organize its passionate experiences in such a way that a genuinely human, self-governed life of virtue and true contentment becomes possible. To bring out this connection, I will read the Meditations against the backdrop of Descartes' correspondence with Elisabeth. This will reveal that in (...) Descartes' writings there is a crucial connection between the conception of ourselves as dreamers and the idea that we fail to realize our true potential as self-determined, active agents. Dreams, as Descartes conceives them, are passively received mental states that inhibit our freedom to use reason at will. To awaken here takes the form of activating our thoughts, which holds the key to freeing ourselves from the stimulus-response patterns that Descartes takes to be at work in animal conduct. Applied to the Meditations, these insights suggest that this work engages in questions far beyond the epistemological agenda. By activating the mind, the Meditations teach us how to realize our true human potential as virtuous thinkers and passionate agents. (shrink)

ABSTRACT E. M. Curley has said that Descartes’ cogito, ergo sum “is as obscure on examination as it is compelling at first glance.” Why should that be? Maybe because the cogito raises so many textual and interpretive questions. Is it an argument or an intuition? If it is an argument, does it require an additional premise? Is it best interpreted as a “performance?” Is it best seen as the discovery that any reason proposed for doubting its success entails the meditator’s (...) existence? And so on. But all these questions typically arise in the wake of worries about the cogency of the cogito when it is treated as an argument and worded in its canonical form, “I think, therefore I exist.” In this essay, I focus on what I take to be the most fundamental reason for questioning the cogito’s cogency when it is so treated—namely that the “I” in its premise is question-begging. I distinguish that reason from other reasons that are sometimes conflated with it, and I argue that it is not a good reason. I then comment on some of the questions mentioned above in light of my defense of the cogito seen in that traditional way. (shrink)

In Descartes's Method of Doubt Janet Broughton examines in depth Descartes's well-known use of the method of doubt in the Meditations. This is a very stimulating book. The book is rich in subtle, interesting ideas, and the writing is engaging in perhaps the best sense for philosophy. It is not only extremely lucid, but in addition one senses Broughton think the issues through on the page in a way that strongly draws the reader in. Broughton pursues the historian's aim of (...) offering an interpretation of Descartes's method of doubt that accounts for the texts. She does so while pursuing the issues with philosophical intensity and depth and connecting her interpretation to contemporary investigations in skepticism. Her evaluation of Descartes's use of the method is mixed: she thinks his ambitions in using it are ‘splendid but doomed, and highly instructive’. After describing the contents of the chapters of the book, I will focus on two issues: Broughton's interpretation of Descartes's anti-skeptical strategy and her treatment of transparency of the mental. (shrink)

Atheism is skeptical towards gods, and atheology advances philosophical positions defending the reasonableness of that rejection. The history of philosophy encompasses many unorthodox and irreligious movements of thought, and these varieties of unbelief deserve more exegesis and analysis than presently available. Going back to philosophy’s origins, two primary types of atheology have dominated the advancement of atheism, yet they have not cooperated very well. Materialist philosophies assemble cosmologies that leave nothing for gods to do, while skeptical philosophies find conceptions of (...) god to be too unintelligible or unsupported by evidence to warrant credibility. The origins and genealogies of these two atheologies are sketched and compared over many centuries down to present-day atheism, which still displays signs of this internecine divide between confident naturalists and agnostic skeptics. (shrink)

In the Optics, Descartes claims that telescopes and microscopes lead to morally certain knowledge. It is unclear, however, that Descartes’s expressed confidence in these instruments is warranted. In this article, I show how a limited range of telescope and microscope observations could lead to morally certain knowledge for Descartes, and how observations beyond this range admit of enough reasonable doubt to undermine moral certainty. I also explain moral certainty as a form of knowledge in Descartes’s scientific practices, his epistemic commitment (...) to optical instruments, and I offer an explanation for why Descartes never used optical instruments in his scientific endeavours. -/- ---- -/- Dans la Dioptrique, Descartes prétend que les télescopes et les microscopes donnent accès à des connaissances moralement certaines. Cependant, il n’est pas certain que la confiance accordée par Descartes à ces instruments soit justifiée. Dans cet article, je montre comment une gamme limitée d’observations effectuées à l’aide d’instruments d’optique pourraient mener aux connaissances moralement certaines pour Descartes, et comment d’autres observations allant au-delà de cette gamme introduisent suffisamment de doute raisonnable pour saper cette certitude morale. Enfin, j’interprète la certitude morale comme une forme de connaissance dans l’empirisme de Descartes, j’explique son engagement épistémique envers les instruments d’optique, et j’éclaire les raisons pour lesquelles il n’a jamais employé d’instruments d’optique dans ses propres recherches scientifiques. (shrink)

(2005). Learning From Descartes, Via Bennett. British Journal for the History of Philosophy: Vol. 13, No. 1, pp. 139-147. doi: 10.1080/0960878042000317636.

Central to Descartes’ philosophy is a view about immutable essences and eternal truths. After mentioning a Platonist account of recollection in Meditation V, Descartes declares that the ideas we have of mathematical notions “are not my invention but have their own true and immutable natures” (AT VII, 64/CSM II, 44).Descartes claims that other important philosophical notions, such as God, mind, body, and human free will (AT VII, 68; AT VIII-2, 348; AT III, 383; AT VII, 433, respectively), also have immutable (...) natures or essences. Although Descartes says a good many things about this view, nowhere does he offer definitive doctrine on the matter, and in fact frequently confuses his reader with apparently inconsistent pronouncements about immutable natures and eternal truths. In this essay, I focus on the immutable natures and propose a solution to two of the main problems associated with Descartes’ position, the metaphysical status of immutable natures and the purported indivisibility of their existence as ideas in the mind. (shrink)

Descartes v Peti meditaciji trdi, da imajo ljudje vrojene ideje geometrijskih likov, kot je trikotnik. Obenem v problematičnem odlomku zapiše, da vrojenim idejam ustrezajo tudi večna bistva. Čeprav so skušali nekateri interpreti ontološki status teh bistev zvesti le v človeškega duha, v članku zagovarjam tezo, da takšno branje ni utemeljeno in da pri gre pri vrojenih idejah in bistvih za dve ločeni entiteti, pri čemer ideje referirajo na večna bistva. Poleg tega Descartes o idejah geometrijskih likov razpravlja tudi v prvem (...) delu Principov filozofije, kjer jih vpiše v okvir teorije univerzalij. Vendar je tu ton precej drugačen: univerzalne ideje likov so v Principih tvorjene in ne vrojene. To nasprotje lahko razrešimo, če upoštevamo, da pri univerzalijah ne gre za vrojene ideje: vse prej so univerzalije iz Principov ideje (ali imena) v širšem smislu, ki jih tvorimo v predstavljanju in s katerimi lažje razvrščamo čutno dani material; spodbudo za takšno pojmovanje mu je verjetno dala razprava iz Tretjih in Petih ugovorov in odgovorov k Meditacijam. Vendar Descartesova teorija univerzalij ni bila docela izdelana: v poznih delih je Descartes na tem področju eksperimentiral tudi z drugimi modeli, denimo z novo teorijo umskega spomina. Ugotovimo torej lahko, da je Descartesova teorija spoznanja geometrijskih predmetov, kot so liki, kompleksna in jo je mogoče docela razumeti šele v diahroni perspektivi. (shrink)

Despite Glouberman—s paper, I adhere to the terms I used earlier to describe the contest between Descartes and Gassendi (and their followers—which was the major part of my argument, unexamined by Glouberman). His attribution to me of a positivist conception of philosophical activity, I claim, better characterizes his own attitude toward evidence, truth, and the cognitive significance of metaphysical claims. Part of what was at stake between Descartes and Gassendi was a communal model of knowledge; within this context, I raise (...) questions about standards of scholarship and their significance. (shrink)

Descartes contends that he, or his mind, is really distinct from his body. Many philosophers have little patience with this claim. What could be more obvious than that the mind depends on the body? But their impatience often dissolves when they recognize that Descartes only asserts a de re modal statement. To say that one thing is really distinct from another is to say that each can exist apart from the other. But should we grant Descartes this de re modal (...) claim itself?Descartes's argument for the real distinction is based on the assumption that clear and distinct conception provides a reliable guide to possibility. (shrink)

The reason Descartes cites for invoking the demon argument in addition to the dream argument is that the demon argument is intended to broaden the scope of Descartes’ scepticism, to subsume additional beliefs under it. I present an additional, unfamiliar reason. There is, I argue, an important difference between the two sceptical arguments. It pertains not to their scope, but to their “depth”, to the kind of scepticism they are capable of inducing.

First published as 「デカルト哲学について」 in June 1944. The essay is included in 『西田幾多郎全集』 [Complete Works of Nishida Kitarō] (Tokyo: Iwanami Shoten, 2002–2009 ), 10: 117-49.

Nietzsche and Modern Times: A study of Bacon, Descartes and Nietzsche. Laurence Lampert. New Haven: Yale University Press, 1993. Pp. xii + 475. £35.00 Nietzsche and Metaphysics. Peter Poellner. Oxford: Clarendon Press, 1995. Pp. xi + 320.