In lieu of an abstract, here is a brief excerpt of the content:Hume on the Idea of Existence1 Phillip D. Cummins One, the primary, aim of this paper is to understand an argument Hume employed to defend his contention that there is no special or distinctidea ofexistence. This contention he expressedvariouslyin the following passage: The idea ofexistence, then, is the very same with the idea of what we conceive tobe existent. To reflect on any thing simply, and to reflect on (...) it as existent, are nothing different from each other. That idea, when conjoin'd with the idea of any object, makes no addition to it. Whatever we conceive, we conceive to be existent. Any idea we please to form is the idea ofa being; and the idea of a being is any idea we please to form.2 My secondary aim is to understand what the quoted claim amounts to as a characterization of the idea of existence. I am among those who have serious difficulty understanding what precisely Hume is here claiming. Specifically, I am not sure how, if at all, his position on the idea ofexistence fits with other elements ofhis theory ofthought.3 For example, earlier in the Treatise, in "OfAbstract Ideas," Hume argued that under suitable conditions of habituation and linguistic competence, a single simple4 idea could be the idea ofboth a particular object, a line drawn on a particular sheet ofpaper, and a type ofobject, line in general (T 20-24). Further, on the basis of appropriate comparisons, a single simple idea can also be the idea oftwo different quaUties, purple and extended, for example (T 24-25, 34). The former claim is the positive component ofHume's account ofabstract thinking; the latter is the positive component of his position on distinctions of reason. Hume goes out ofhis way to distinguish his position on the idea of existence from his position on distinctions of reason (T 67). As for how it differs, ifat all, from his position on abstract ideas, a matter by no means obvious, Hume says nothing at all. His silence does not preclude speculation on the subject—on the contrary, it makes such speculation unavoidable—but it does give special importance to his brief and puzzhng proof that there is no special or distinct idea of existence. Volume XVII Number 1 61 PHILLIP D. CUMMINS I. Hume's Argument In making his case that we have no distinct idea of existence Hume first insists that we have an idea of existence, appealing to what he regards as an undeniable matter of psychological fact. He writes, There is no impression nor idea ofany kind, ofwhich we have anyconsciousness or memory, thatis not conceiVd as existent; and 'tis evident, that from this consciousness the most perfect idea and assurance ofbeing is deriv'd. (T 66) The argument seems to comprise the following propositions: attending to consciousness and memory reveals that all the perceptions we experience or remember are believed to exist; one cannot beUeve in the existence of something unless one has an idea of existence; therefore, there is an idea ofexistence (being) which in some way is derived from consciousness and memory. Hume next formulates what he calls a dilemma. From hence we may form a dilemma, the most clear and conclusive that can be imagin'd, viz. that since we never remember any idea or impression without attributing existence toit, the idea ofexistence must eitherbe deriv'd from a distinct impression, conjoin'd with every perception or object ofour thought, or must be the very same with the idea of the perception or object. (T 66) The alternatives seem clear: either, in believing in the past existence of, say, a blue spot once seen, one has two ideas, one of the blue spot and a different one of existence, or one has only one idea, which somehow is both the idea of the spot and the idea ofexistence. What is not immediately obvious is why Hume speaks ofa dilemma. From the supposed psychological fact (we never remember any idea or impression without attributing existence to it) and its corollary (we have an idea ofexistence) Hume develops a disjunction (either the idea ofexistence is derived from a distinct impression conjoined with every perception, or... (shrink)

Hume discusses the distinction of reason to explain how we distinguish things inseparable, and so identical, e.g., the color and figure of a white globe. He says we note the respect in which the globe is similar to a white cube and dissimilar to a black sphere, and the respect in which it is dissimilar to the first and similar to the second. Unfortunately, Hume takes these differing respects of resemblance to be identical with the white globe itself. Contradiction results, (...) undermining his theory of abstraction. The way out is apparently to admit an intrinsic complexity in even simple things. (shrink)

Hume is a naturalist in many different respects and about many different topics; this paper argues that he is also a naturalist about intentionality and representation. It does so in the course of answering four questions about his theory of mental representation: (1) Which perceptions represent? (2) What can perceptions represent? (3) Why do perceptions represent at all? (4) Howdo perceptions represent what they do? It appears that, for Hume, all perceptions except passions can represent; and they can represent bodies, (...) minds, and persons, with their various qualities. In addition, ideas can represent impressions and other ideas. However, he explicitly rejects the view that ideas are inherently representational, and he implicitly adopts a view according to which things (whether mental or non-mental) represent in virtue of playing, through the production of mental effects and dispositions, a significant part of the causal and/or functional role of what they represent. It is in virtue of their particular functional roles that qualitatively identical ideas are capable of representing particulars or general kinds; substances or modes; relations; past, present, or future; and individuals or compounds. (shrink)

It has been argued that Hume's denial of infinite divisibility entails the falsity of most of the familiar theorems of Euclidean geometry, including the Pythagorean theorem and the bisection theorem. I argue that Hume's thesis that there are indivisibles is not incompatible with the Pythagorean theorem and other central theorems of Euclidean geometry, but only with those theorems that deal with matters of minuteness. The key to understanding Hume's view of geometry is the distinction he draws between a precise and (...) an imprecise standard of equality in extension. Hume's project is different from the attempt made by Berkeley in some of his later writings to save Euclidean geometry. Unlike Berkeley, who interprets the theorems of Euclidean geometry as false albeit useful approximations of geometrical facts, Hume is able to save most of the central theorems as true. (shrink)

Scholars have almost universally agreed that Hume's account of space and time as manners of disposition of impressions is inconsistent with one of the most fundamental tenets of his empiricism: the thesis that all ideas are derived from simple impressions. This paper challenges that view and argues that Hume's position on the origin of our ideas of space and time is a profound, original, virtually unique, and even courageous approach to the problem of original space and time cognition, and a (...) theory that allows for hitherto unrecognized expansions to the resources available to his empiricism. (shrink)

In A Treatise of Human Nature, Hume attempts to explain all human cognition in terms of impressions, ideas, and their qualities, behaviors, and relations. This explanation includes a complicated attempted reduction of beliefs, or judgments, to single ideas. This paper attempts to demonstrate one of the inadequacies of this approach, and any of its kind (any attempted reduction of judgments to their constituent parts, single or multiple) via an argument concerning the logical forms of judgment found implicitly in Kant's Critique (...) of Pure Reason, and more explicitly in the works of Wilfrid Sellars. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:17. HUME AND ABSTRACT GENERAL IDEAS In his discussion of abstract ideas in the Treatise, Hume offers what "...may... be thought... a plain dilemma, that decides concerning the nature of those abstract ideas..." He states the dilemma in these words: The abstract idea of a man represents men of all sizes and all qualities; which 'tis concluded it cannot do, but either by representing at once all possible sizes (...) and all possible qualities, or by representing no particular one at all. Now it having been esteemed absurd to defend the former proposition, as implying an infinite capacity in the mind, it has been commonly infer'd in favour of the latter; and our abstract ideas have been suppos'd to represent no particular degree either of quality or quantity. (T, 1,1,7,?.18) However, with respect to this dilemma, Hume says: But that this inference is erroneous, I shall endeavor to make appear, first, by proving, that 'tis utterly impossible to conceive any quantity or quality, without forming a precise notion of its degrees: And secondly by showing, that tho' the capacity of the mind be not infinite, yet we can at once form a notion of all possible degrees of quantity and quality, in such a manner at least, as, however imperfect, may serve all the purposes of reflexion and conversation. (T, 1,1,7, p. 18) The second item Hume claims he is about to prove is aimed at the first disjunct of the above-stated dilemma; more specifically, it is aimed at the claim that (1) An abstract idea (e.g., of a man) represents all possible degrees of quantity and quality (in men) only if the human mind is infinite in capacity. To show that (1) is false, Hume offers his own positive account of how ideas which are particular in nature may nevertheless be general in representation, even though the mind's capacity is finite. The first item Hume sets out to prove is aimed at the second disjunct, and conclusion, of the dilemma; it is aimed, that is, at 18. (2)Abstract ideas represent no particular degree of either quantity or quality. In this paper I will be concerned solely with Hume's attack on (2); it is this attack in which Hume says I "place my chief confidence." (T, I, I, 7, p. 24) I_ As stated, (2) is ambiguous, since it might be taken to mean that abstract ideas fail to represent altogether, or that they fail to represent any quantity or quality however construed. But, I believe, Hume means neither of these; he means, instead, that (2a) Abstract ideas represent non-particular, indeterminate degrees of quantity or quality. Now recall that Hume tries to refute (2a) by establishing, as he says, that (3)It is impossible to conceive any quantity or quality without forming a precise notion of its degrees. But how, by establishing (3), would Hume thereby refute or aid in the refutation of (2a)? And, for that matter, how does he support (3)? Hume's case for (3) consists of three arguments, the respective conclusions of which are most pertinent here. He concludes his first argument by saying that (4)...the general idea of a line...has in its appearance in the mind a precise degree of quantity and quality. (T, 1,1,7, p. 19) The conclusion of the second argument is this : (5)An idea is a weaker impression; and as a strong impression must necessarily have a determinate quantity and quality, the case must be the same with its copy or representative.(T, 1,1,7, p. 19) 19. and of the third it is this: (6)Abstract ideas are therefore in themselves individual, however they may become general in their representation. The image in the mind is only that of a particular object, tho' the application of it in our reasoning be the same, as if it were universal.(T, 1,1,7, p. 20) Construed in a fully general way, these conclusions assert that (7)Each idea is determinate with respect to öegree of) quantity and quality. But notice that (7) is not equivalent to, and does not obviously imply, (3). Hence, Hume... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Hume Studies Volume XXIV, Number 1, April 1998, pp. 71-94 Hume on the Very Idea of a Relation MICHAEL COSTA I think it is a productive strategy in interpreting Hume's philosophy to examine very carefully exactly what constitutes for Hume the cognitive state of having a certain idea or belief. More often than not, interpretive pressures arise almost immediately when one comes to address the details in such cases. (...) Attempting to relieve these interpretive pressures can have substantial payoffs in understanding and evaluating Hume's philosophy, even when the attempts are not entirely successful.1 In this paper, I am going to raise the question, "What is the very idea of a relation for Hume?" which I will understand to mean, "What exactly constitutes the cognitive state of having an idea of a relation for Hume?" First I will argue for a particular account of what an idea of a relation must consist in for Hume. The account that I describe is essentially the same as one that has already been introduced by some recent work of Don Garrett,2 but I will offer here a new way of arriving at it. Also, I will examine in detail the capacity of the account to deal with each of Hume's categories of relation. Hume has extensive discussions of some of these (the "matters of fact" relations of space, time, identity, and causation), but almost nothing to say about some of the others (the "relations of ideas" of resemblance, contrariety, degree of quality, and quantity and number). All of them raise interpretive problems, and attempting to resolve them will suggest new ways of understanding a number of important issues in Hume's philosophy including: the nature of the cognitive process of comparing ideas and Michael Costa is at the Department of Philosophy, University of South Carolina, Columbia, South Carolina 29208 USA. email: [email protected] 72 Michael Costa deriving a general idea from the comparison, the distinction between having a belief and making an assertion or explicit judgment on the basis of one's beliefs, the nature of a fiction or fictitious idea, how Hume thinks that language and symbols enhance cognitive processing, and how we should understand Hume's empiricist criterion of meaning. The obvious place to start in addressing the question of what ideas of relation consist in for Hume is the section "Of relations" that appears early in the Treatise? Just prior to this section Hume indicates that he thinks of relations as complex ideas. He says, "complex ideas may be divided into Relations, Modes, and Substances" (T 13). He goes on in the section to draw a distinction between natural and philosophical relations as a distinction between those relations that are connected to associations in thought (the natural relations) and all relations whatsoever that can be conceived (the philosophical relations) (T 13-14). But that distinction does not in itself shed any light on the nature of our ideas of the latter as complex ideas. Nor, initially, do Hume's brief remarks on each of the seven categories of relations (T 14-15), although we will find some interesting issues to mine here after getting a better understanding of Hume's account of relations as complex ideas. We can get some help by recalling the way in which Hume draws the distinction between simple and complex ideas. This division is into Simple and Complex. Simple perceptions or impressions and ideas are such as admit of no distinction nor separation. The complex are the contrary to these, and may be distinguished into parts. Tho' a particular colour, taste, and smell are qualities all united together in this apple, 'tis easy to perceive they are not the same, but are at least distinguishable from each other. (T 2) A complex idea is one that can be distinguished into parts. Hume's illustration of the apple can easily mislead. He seems to be talking about an apple (physical object) as a collection of qualities. But for this to serve as an illustration of the distinction under discussion we must read him as talking about an impression or idea of an apple being a collection of impressions... (shrink)