Lawrence Nolan

This chapter develops a new defense of the conceptualist interpretation of Descartes’s theory of universals, according to which universal essences are merely innate, intellectual ideas in the minds of human beings. The source of this conceptualism is to be found in Descartes’s view that all substances are simple. Given this simplicity, universals can exist neither in created things as shared properties nor in the mind of God as ideas or exemplars for creation. Descartes rejects the Neoplatonic doctrine of exemplary causation on the grounds that it anthropomorphizes God. He also rejects the related doctrine of divine ideas that was intended by medieval philosophers to explain divine knowledge of creaturely essences in terms of God’s knowledge of himself. It is argued here that Descartes’s God knows these essences by knowing created substances directly. This chapter also responds to objections to the conceptualist interpretation and identifies the failings of rival Platonist readings.

In the Fifth Meditation, Descartes makes a remarkable claim about the ontological status of geometrical figures. He asserts that an object such as a triangle has a ‘true and immutable nature’ that does not depend on the mind, yet has being even if there are no triangles existing in the world. This statement has led many commentators to assume that Descartes is a Platonist regarding essences and in the philosophy of mathematics. One problem with this seemingly natural reading is that it contradicts the conceptualist account of universals that one finds in the Principles of Philosophy and elsewhere. In this paper, I offer a novel interpretation of the notion of a true and immutable nature which reconciles the Fifth Meditation with the conceptualism of Descartes’ other work. Specifically, I argue that Descartes takes natures to be innate ideas considered in terms of their so‐called ‘objective being’.

In the Principles of Philosophy, Descartes makes a remarkable claim that has never received the proper recognition it deserves. He asserts that there is merely a "rational distinction" between a substance and each of its attributes. I argue that, properly understood, this claim means that a substance and each of its attributes are numerically identical in reality, and distinguished only within our thought by means of reason. I then use this central insight to resolve a number of apparent inconsistencies and interpretive puzzles that have plagued Descartes' philosophy. ;The most important of these problems concerns Descartes' theory of essences. In the Fifth Meditation, Descartes claims that certain objects such as geometrical figures have "true and immutable natures or essences" that do not depend on the mind, yet have being even if there are no such things existing in the world. On the basis of this statement, a number of influential scholars have concluded that Descartes is a Platonist regarding essences and in the philosophy of mathematics. One problem with this seemingly natural reading is that it contradicts the conceptualist, anti-realist strain that one finds in his other works. I enlist the theory of rational distinction to show decisively that Descartes is a conceptualist regarding essences and all universals. ;The theory of rational distinction illuminates several other features of Descartes' ontology as well--including the status of attributes and their distinction from modes, the notion of substance, the relation between essence and existence, the nature of space, the doctrine of divine simplicity, and the notion of a principal attribute. ;My central thesis also reveals that the so-called ontological "argument" is not a formal proof but the assertion of an intuition akin to the Cogito. I confirm this interpretation by investigating a poorly understood method called "analysis" employed in the Meditations. Descartes holds that the greatest impediments to knowledge are various philosophical prejudices that obscure and confound our innate ideas, particularly our innate idea of God. Analysis is the method for dispelling these prejudices. Once they are removed, God's existence is more self-evident than the simplest mathematical truth

This long and ambitious work offers a systematic interpretation of Cartesian metaphysics and epistemology from the perspective of Descartes’s so-called founding principle, cogito ergo sum. The book is organized around the three parts of this famous dictum, though its scope is much more encompassing. Part 1 offers a careful analysis of the “formal structure” of Cartesian thought, in an effort to identify what is distinctive about the cogito and to uncover how Descartes’s theory of mind makes this insight possible. Part 2 addresses the notions of truth and certainty as they relate to the claim “I exist”. Part 3 tackles one of the most vexed interpretive questions relating to the cogito, namely, whether and in what sense “I exist” is inferred from “I think,” as the logical particle ergo would seem to suggest. The cogito principle, however, is only the lens through which Miles examines Descartes’s larger system. One attractive feature of the project is that he uses this principle to develop what he takes as a key to Descartes’s philosophy—the process of “analytical reflexion” by which knowledge that was previously only implicit is explicitly intuited. This interpretive key is then employed to unlock many of the other major Cartesian themes, including the method of doubt, clear and distinct perception, innate ideas, analytic and synthetic method, the infamous Circle, and the divine creation of the eternal truths. The result is a set of extremely scholarly readings of important texts and doctrines that, if not always convincing, is fresh, nuanced, and provocative.

Fourteen newly commissioned essays trace the historical development of the distinction between primary and secondary qualities, which lies at the intersection of issues in metaphysics, epistemology, and philosophy of perception. 'Primary and Secondary Qualities' focuses on the age of the Scientific Revolution, the 'locus classicus' of the distinction, but begins with chapters on ancient Greek and Scholastic accounts of qualities in an effort to identify its origins. The remainder of the volume is devoted to philosophical reflections on qualities from the seventeenth century to the present day. Virtualliy every major figure is represented from Gassendi to Kant, and special attention is paid to Locke, Descartes, and Hume. The essays collected here cover a wide range of topics, including the foundation for the distinction, the question of whether it is lmetaphysical or merely epistemic, the status of secondary qualities, the nature of sensoriy representation, the relation between philosophy and science, the status of dispositions, and the semantics of sensible-quality terms"--Publisher's description, p. [4] of dust jacket.

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 43.1 (2005) 55-81 [Access article in PDF] Self-Knowledge in Descartes and Malebranche Lawrence Nolan John Whipple 1. Introduction Descartes's notorious claim that mind is better known than body has been the target of repeated criticisms, but none appears more challenging than that of his intellectual heir Nicolas Malebranche.1 Whereas other critics—especially twentieth-century philosophers eager to use Descartes as their whipping boy—have often been uncharitable, Malebranche accepts many of the fundamental Cartesian doctrines, including mind-body dualism. But he argues that Descartes's position on knowledge of the mind is internally inconsistent. Malebranche agrees with Descartes that the existence of the mind is better known than that of body, but he vehemently denies that the nature of the mind is better known. This denial is based on his view that we lack a clear idea of the mind.2 [End Page 55]Malebranche's polemic has attracted much attention in recent scholarship.3 The growing consensus among commentators is that Malebranche develops a devastating internal critique of Descartes's theory of the mind. For example, Nicholas Jolley writes: "In his case for his negative thesis [concerning knowledge of the mind] Malebranche mounted a powerful, even annihilating, critique of Descartes. This critique embodies the remarkable insight that there is a serious muddle at the heart of Descartes's whole theory of knowledge."4 In a book-length defense of Malebranche's critique, Tad Schmaltz also emphasizes its internal character: "the interpretation here of Malebranche's theory presents it as fundamentally Cartesian, and thereby serves to reinforce his own view that he has provided an authoritative interpretation of the account of mind in the writings of Descartes and other Cartesians."5 Schmaltz also asserts: "Malebranche took his negative thesis concerning our knowledge of the soul to involve not so much a rejection of Cartesianism as an internal correction of it."6We think such remarks misstate the case. Indeed, we argue in this paper that Malebranche's polemic fails as an internal critique of Descartes's theory of the mind. Although we do not here aspire to defend Descartes's strong thesis—that mind is better known than body—we do think he can consistently maintain that we have a clear and distinct idea of the mind, and thus that our knowledge of the mind's nature is at least on a par with our knowledge of corporeal nature.7 While Malebranche's rhetoric would encourage us to think that the debate between him and his predecessor is being fought on common or neutral ground, the fact is that Malebranche often appeals to assumptions and aspects of his own theory of "Vision in God" that Descartes would reject. Once more, he interprets Descartes's theory of knowledge in ways that are misguided and sometimes even uncharitable. If Malebranche's critique succeeds at all, it succeeds only against a straw man—Malebranche's Descartes and not the historical figure.Ours is not the first effort to defend Descartes against this particular attack. When Malebranche first published his critique in Book Three of his first great work, The Search After Truth (1674),8 Descartes had been dead for over two decades, [End Page 56] but he was ably defended by the famous Cartesian Antoine Arnauld in On True and False Ideas (1683). In the ensuing debate Arnauld was clearly the superior dialectician, but while winning several tactical points, he appears not to fully appreciate the crux of Malebranche's argument, or at least that is the view of Jolley and Schmaltz.9 We have a somewhat higher opinion of Arnauld's side of the debate. Granted, some of his defenses are facile and can be easily dismissed; others however are quite compelling when properly developed. In at least one instance, we attempt to provide that development. At the same time we think it is a mistake to treat Arnauld as Descartes's surrogate or as if he had issued the final salvo from the camp of the orthodox Cartesians. Arnauld was a...

I argue that Descartes intended the so-called ontological "argument" as a self-validating intuition, rather than as a formal proof. The textual evidence for this view is highly compelling, but the strongest support comes from understanding Descartes's diagnosis for why God's existence is not 'immediately' self-evident to everyone and the method of analysis that he develops for making it self-evident. The larger aim of the paper is to use the ontological argument as a case study of Descartes's nonformalist theory of deduction and his method of analysis, showing how he conceives the latter as a form of philosophical therapy.

We argue that Descartes’s theistic proofs in the ’Meditations’ are much simpler and straightforward than they are traditionally taken to be. In particular, we show how the causal argument of the "Third Meditation" depends on the intuitively innocent principle that nothing comes from nothing, and not on the more controversial principle that the objective reality of an idea must have a cause with at least as much formal reality. We also demonstrate that the so-called ontological "argument" of the "Fifth Meditation" is best understood not as a formal proof but as an axiom, revealed as self-evident by analytic meditation

Nicolas Malebranche holds that we see all things in the physical world by means of ideas in God (the doctrine of "vision in God"). In some writings he seems to posit ideas of particular bodies in God, but when pressed by critics he insists that there is only one general idea of extension, which he calls “intelligible extension.” But how can this general and “pure” idea represent particular sensible objects? I develop systematic solutions to this and two other putative difficulties with Malebranche’s theory of sensory cognition by appealing to the notion of “seeing as” and to his doctrine that ideas in God have causal powers to affect the mind.

In the Fifth Meditation, Descartes makes a remarkable claim about the ontological status of geometrical figures. He asserts that an object such as a triangle has a 'true and immutable nature' that does not depend on the mind, yet has being even if there are no triangles existing in the world. This statement has led many commentators to assume that Descartes is a Platonist regarding essences and in the philosophy of mathematics. One problem with this seemingly natural reading is that it contradicts the conceptualist account of universals that one finds in the Principles of Philosophy and elsewhere. In this paper, I offer a novel interpretation of the notion of a true and immutable nature which reconciles the Fifth Meditation with the conceptualism of Descartes' other work. Specifically, I argue that Descartes takes natures to be innate ideas considered in terms of their so-called 'objective being'.

The Cambridge Descartes Lexicon is the definitive reference source on René Descartes, 'the father of modern philosophy' and arguably among the most important philosophers of all time. Examining the full range of Descartes' achievements and legacy, it includes 256 in-depth entries that explain key concepts relating to his thought. Cumulatively they uncover interpretative disputes, trace his influences, and explain how his work was received by critics and developed by followers. There are entries on topics such as certainty, cogito ergo sum, doubt, dualism, free will, God, geometry, happiness, human being, knowledge, Meditations on First Philosophy, mind, passion, physics, and virtue, which are written by the largest and most distinguished team of Cartesian scholars ever assembled for a collaborative research project - 91 contributors from 12 countries.