Hume invokes the separability of perceptions to derive some of his most contentious pronouncements. To assess the cogency of the arguments, the notion must first be clarified. The clarification reveals that sic different separability claims must be distinguished. Of these, I consider the three that are rarely discussed. They turn out to be unacceptable. Locke espouses none of them.This Article does not have an abstract.

Hume's Copy Principle, which accords precedence to impressions over ideas, is restricted to simple perceptions. Yet in all the conceptual analyses Hume conducts by attempting to fit an impression to a (putative) idea, he never checks for simplicity. And this seems to vitiate the analyses: we cannot conclude from the lack of a preceding impression that a putative idea is bogus, unless it is simple. In this paper I criticise several attempts to account for Hume's seemingly cavalier attitude, and offer (...) one of my own. (shrink)

It's a common idea in philosophy that we possess a peculiar kind of "phenomenal concept" by which we can think about our conscious states in "inner" and "direct" ways, as for example, when I attend to the way a current pain feels and think about this feeling as such. Such phenomenal ways of thinking figure in a variety of theoretical contexts. The bulk of this article discusses their use in a certain strategy – the phenomenal concept strategy – for defending (...) the physicalist view that conscious states are reducible to brain states. It also considers, more briefly, how phenomenal concepts have been used to defend dualism about consciousness, and how they have been used to explain our special access to our consciousness. It concludes with a discussion about whether, and in what more precise sense of the term, we at all possess "phenomenal concepts" of our conscious states. (shrink)

In many diagrams one seems to perceive necessity – one sees not only that something is so, but that it must be so. That conflicts with a certain empiricism largely taken for granted in contemporary philosophy, which believes perception is not capable of such feats. The reason for this belief is often thought well-summarized in Hume's maxim: ‘there are no necessary connections between distinct existences’. It is also thought that even if there were such necessities, perception is too passive or (...) localized a faculty to register them. We defend the perception of necessity against such Humeanism, drawing on examples from mathematics. (shrink)

The idea of the missing shade of blue presents a difficulty for Hume's first principle that ‘all our simple ideas in their first appearance are deriv'd from simple impressions, which are correspond...

This paper provides support for the unorthodox view that Hume’s simple ideas are most fruitfully understood as theoretical posits by showing that adopting this interpretation solves a lingering interpretive difficulty, the missing shade of blue. The missing shade of blue is thought to pose a serious challenge to the legitimacy of Hume’s copy principle. Thinking of Humean simple ideas as theoretical posits reveals a dialectical mismatch between Hume and his envisioned reader that, once understood, makes it clear that the case (...) holds little sway against the copy principle. The solution developed and defended has some significant advantages over extant solutions. (shrink)

What to do with the missing shade of blue? Some have argued that Hume's famous thought experiment undermines his central doctrine – the ‘copy principle’ – such that he should have revised his whole theory in light of it. Others contend that the MSB is not a true or actual counterexample to the copy principle, but merely an apparent or conceivable one, so that he had no such obligation to revise. In this essay, I argue that even if the MSB (...) is a true counterexample, Hume would not have been obligated to revise his theory, given methodological resources he makes available to himself elsewhere in his work and his overarching empiricist aims. And I offer a new suggestion for why he might have included and even highlighted the MSB in his writings despite its being so very vexing and peculiar. (shrink)

ABSTRACT A restricted interpretation of Humean methodology understands his experimentalism solely in terms of reducing epistemic statements to private sensory impressions accessible via introspection. My aim is to revise this interpretation by means of criticizing the connection it establishes between the maxim of not going beyond experience and the copy principle. I will show that this interpretation is inconsistent with the way Hume conceives the experimental method, since there is textual evidence to affirm that experience should not be understood in (...) terms of sensory impressions only, and that the science of human nature is not restricted to the study of the mental contents only, but it is nourished in the same way by the observation of social interaction. Finally, I will argue that the method Hume proposes does not prevent intersubjective verification of the empirical evidence, since the principle of sympathy enables the communication of mental states, which makes them devoid of their private character. (shrink)

This chapter contains section titled: Impressions and Ideas Original and Secondary Impressions Ideas of Memory and Imagination The Copy Principle Simple and Complex Perceptions General Terms References Further reading.

This thesis was on how God is related to the truth-values of propositions on possible worlds - specifically, those propositions that do not seem to be about Him and constitute His ideas for what to create. It opened with a survey of some historical positions with special emphasis on Aquinas, Leibniz, Spinoza and Kant. Next, some criticisms were given for these so-called deity theories with the most space given to Brian Leftow’s critiques. The second chapter detailed Brian Leftow’s theological modality. (...) In it, secular modality is excogitated in an instant from eternity when God gets a set of creaturely natures in one imaginative act. His preferences that are based on His nature then determine the modality of what God thinks up. A number of objections were raised for the Leftowian project and the last chapter attempted to supplement an older deity theory with some insights from Leftow in order to avoid his initial criticisms. (shrink)

Frank Jackson’s knowledge argument is a very influential piece of reasoning that seeks to show that colour experiences constitute an insoluble problem for science. This argument is based on a thought experiment concerning Mary. She is a vision scientist who has complete scientific knowledge of colours and colour vision but has never had colour experiences. According to Jackson, upon seeing coloured objects, Mary acquires new knowledge that escapes her complete scientific knowledge. He concludes that there are facts concerning colour experiences (...) that scientific knowledge can neither describe nor explain. Specifically, these facts involve the occurrence of certain non-physical properties of experiences that he calls qualia. The present research considers whether a plausible formulation of the hypothesis that science can accommodate colour experiences is threatened by a version of the knowledge argument. The specific formulation of this problem has two motivations. Firstly, before investigating whether the knowledge argument raises a problem for the claim that science can account for colour experiences, we need a plausible formulation of this claim. I argue that the idea that science can accommodate colour experiences can be formulated as the modest reductionism hypothesis. Roughly speaking, this is the hypothesis that a science that can be explanatory interfaced with current physics of ordinary matter can account for conscious experiences. Secondly, an unintelligible premise figures in Jackson’s version the knowledge argument. Namely, it is assumed that Mary possesses a complete scientific knowledge. Nevertheless, the type of strategy involved in Jackson’s argument can be used to target modest reductionism. By considering contemporary psychophysics and neuroscience, I characterise Mary’s scientific knowledge. First, this characterisation is intelligible. In fact, it is elaborated on the basis of descriptions and explanations of colour experiences involved in current physics and neuroscience. Second, a supporter of modest reductionism can assume that the scientific knowledge ascribed to Mary might account for colour experiences. The main conclusion of the present research is that our version of the knowledge argument fails to threaten the modest reductionism hypothesis. In fact, I endorse what can be called the “two ways of thinking” reply to the knowledge argument. According to this response, the knowledge argument shows that there are different ways of thinking about colour experiences. One way of thinking is provided by scientific knowledge. The other way of thinking is provided by our ordinary conception of colour experiences. However, the existence of these two ways of thinking does not imply the existence of facts and properties that escape scientific knowledge. It might be the case that the ordinary way of thinking about colour experience concerns facts and properties described and explained by science. The principal conclusion of the research results from two investigations. The first line of research aims to reveal and evaluate the implicit assumptions that figure in the knowledge argument. The main body of the research is dedicated to this task. The principal result of this investigation is that the knowledge argument must rely on an account of introspective knowledge of colour experiences. I argue that an inferential model of introspection provides such account. On this model, Mary’s capacity to hold beliefs about her colour experiences when she sees coloured objects requires her mastery of colour concepts. The second main investigation seeks to justify the two ways of thinking strategy. As many opponents and supporters have recently started to realise, this strategy might be charged with being ad hoc. I offer a distinctive justification of this reply to the knowledge argument. Assuming the account of introspection mentioned above, the existence of visual recognitional colour concepts might justify this strategy. A person possesses these concepts when she is able to determine the colours of objects simply by having visual experiences. (shrink)

Hume began his Treatise with the bold intention to turn philosophy into a ‘science of man’. In the conclusion to Book One, however, Hume’s confidence is replaced with intense despair over the unreliability of this human science. Rather quickly, however, Hume rejects this despair, accepting that such scepticism is unwarranted and can be cured by reference to our natural associative tendencies. Many have suggested that Hume emerged from this crisis because he changed his feelings about the matter, with little justification. (...) In this thesis, by contrast, I argue that Hume’s jump from pessimism to optimism relies upon his arguments about the ‘empire of imagination’ in the creation of our ideas and beliefs about the experienced world. The key, as I will show, is how one interprets the creative imagination, which Hume refers to as the fancy. My central hypothesis is that there are two distinct roles played by the fancy: the critical and the fictitious. The critical fancy mixes with natural causation to create ideas that represent the world as we experience it. The fictitious fancy creates ideas that do not represent the world as we experience it. In essence, my argument is that the dialectic between the two types of fancy allowed Hume to emerge from his sceptical crisis because our fundamental beliefs about the world have a basis in a particular natural function of the imagination that renders their formation possible. More specifically, the critical fancy serves to justify our beliefs about the world as we experience it. (shrink)