“Perception is controlled hallucination,” according to proponents of predictive processing accounts of vision. I say they are right that something like this is a consequence of their view but wrong in how they have pursued the idea. The focus of my counterproposal is the causal theory of perception, which I develop in terms of a productive concept of causation. Cases of what otherwise seem like successful perception are instead mere veridical hallucination if predictive processing accounts are correct, I argue, because (...) of the role played within such accounts by absences, which cannot enter into productive causal relations. -/- I offer two arguments in support of the productive theory of perception. The first is loosely Kantian, focusing on the role that receptivity and spontaneity play in perception. The second focuses on what perception and hallucination have in common. I conclude with a series of objections and replies. (shrink)

A great deal of the criticism directed at Locke's theory of abstract ideas assumes that a Lockean abstract idea is a special kind of idea which by its very nature either represents many diverse particulars or represents separately things that cannot exist in separation. This interpretation of Locke has been challenged by scholars such as Kenneth Winkler and Michael Ayers who regard it as uncharitable in light of the obvious problems faced by this theory of abstraction. Winkler and Ayers argue (...) that Locke instead held that to have an abstract idea is to attend selectively to some portion of the content of a particular idea. On this view, to have an abstract idea is not to have a special kind of idea but to have an ordinary idea in a special way. Ayers argues that Locke inherited this theory from Arnauld. I argue that the case made by Ayers for the attribution of the extrinsic theory to Locke rests on a misinterpretation of Arnauld. In fact, both Locke and Arnauld regard selective attention as part of a process whereby a new kind of idea is constructed. (shrink)

Malebranche argues that ideas are representative beings existing in God. He defends this thesis by an inference to the best explanation of human perception. It is well known that Malebranche’s theory of vision in God was forcefully rejected by philosophers such as Arnauld, Locke, and Berkeley. However, the notion that ideas exist in God was not the only controversial aspect of Malebranche’s approach. Another controversy centered around Malebranche’s view that ideas are to be understood as posits in an explanatory theory. (...) Opponents of this approach, including Arnauld and Locke, held that our talk about ideas was not explanatory but instead merely descriptive: we use the word ‘idea’ to describe phenomena that we observe by reflecting on our own minds. This controversy has not received much attention from scholars, but in the present paper I will show that it was an explicit and important subject of concern for Malebranche, Arnauld, Locke, and Berkeley and that attention to this controversy can illuminate several aspects of these philosophers’ work. (shrink)

At the heart of Descartes’s theory of cognition is the act of perceiving an idea. However, it remains unclear what precisely an idea is, what the act of perceiving ideas amounts to, and how that act contributes to the formation of cognition under Descartes’s view. In this paper, I provide an account of perceiving ideas that clarifies Descartes’s notion of an idea and explains the fundamental role that the perceiving of ideas occupies in his theory of cognition. At the end (...) of the paper, I will address an issue that arises regarding the objective reality of ideas and the unity of mind. (shrink)

The dissertation concerns on the theory of perception of David Hume. The problem of perception is the problem about the object of perception. According to Jerome Valberg, the problem of perception is an antinomy. For Hume the problem is a dilemma between two theories, direct realism and representative realism. For direct realism, the object of perception is a mind-indipendent object; for representative realism, the object of perception is a mind-dependent object or an internal one. In the chapter I, I have (...) focused on the positions of Descartes and John Locke. In the chapter II, I have presented the conception of Hume through three different arguments: the argument from illusion, the argument from secondary qualities and the argument from hallucination. Then, I have exposed the Humean objections to the proofs of external world and the theory about belief in an unperceived existence. Hume’s position is the following: the object of perception is an internal object and the representative realism is unverifiable, but not false. It follows, then, that for Hume direct realism is false. In the chapter III, I have compared the theory of Hume with contemporary direct realism, namely, with intentionalism of John Searle and Micheal Huemer, with externalism of Tyler Burge and disjunctivism by Michael Martin. I have argued that Hume’s theory is more consistent than intentionalism of Searle and Huemer and it can’t be objected by externalism and disjunctivism. (shrink)