Online research in philosophy

The question how to account for illusion has had a prominent role in shaping theories of perception throughout the history of philosophy. Prevailing philosophical wisdom today has it that phenomena of illusion force us to choose between the following two options. First, reject altogether the early modern empiricist idea that the core subjective character of perceptual experience is to be given simply by citing the object presented in that experience. Instead we must characterize perceptual experience entirely in terms of its representational content. Second, retain the early modern idea that the core subjective character of experience is simply constituted by the identity of its direct objects, but admit that these must be mind-dependent entities, distinct from the mind-independent physical objects we all know and love. I argue here that the early modern empiricists had an indispensable insight. The idea that the core subjective character of perceptual experience is to be given simply by citing the object presented in that experience is more fundamental than any appeal to perceptual content, and can account for illusion, and indeed hallucination, without resorting to the problematic postulation of any such mind-dependent objects.

The Topic: Much work has been done on the nature of perceptual representation. Familiar debates surround questions about the content of perceptual experience, such as: Is the content wide or narrow? Is the content conceptual or non-conceptual? What is the relation between content and phenomenal character? However, a fundamental question that has not received a great deal of attention is what are the admissible contents of perceptual experience? Equivalently, what contents do perceptual experiences have? Or, which objects and properties are represented in perceptual experience?

What is the role of conscious perceptual experience in making thought about the mind- independent empirical world possible? What is the role of such experience in the acquisition of empirical knowledge, about the way things are in that world? What is the relation between these two roles? My central argument is intended to establish that a proper account of the way in which perceptual experience is essential to our grasp of determinate thoughts about particular things in the world around us will at the same time yield a full explanation of the fundamental role which such experience plays in the acquisition of empirical knowledge, by providing us with reasons, which we recognize as such, to endorse the most basic thoughts about mind-independent things in belief.

One of the promising approaches to the problem of perceptual consciousness has been the representational theory, or representationalism. The idea is to reduce the phenomenal character of conscious perceptual experiences to the representational content of those experiences. Most representationalists appeal specifically to non-conceptual content in reducing phenomenal character to representational content. In this paper, I discuss a series of issues involved in this representationalist appeal to non-conceptual content. The overall argument is the following. On the face of it, conscious perceptual experience appears to be experience of a structured world, hence to be at least partly conceptual. To validate the appeal to non-conceptual content, the representationalist must therefore hold that the content of experience is partly conceptual and partly non-conceptual. But how can the conceptual and the non-conceptual combine to form a single content? The only way to make sense of this notion, I argue, leads to a surprising consequence, namely, that the representational approach to perceptual consciousness is a disguised form of functionalism.

Though it enjoys widespread support, the claim that perceptual experiences possess nonconceptual content has been vigorously disputed in the recent literature by those who argue that the content of perceptual experience must be conceptual content. Nonconceptualism and conceptualism are often assumed to be well-defined theoretical approaches that each constitute unitary claims about the contents of experience. In this paper I try to show that this implicit assumption is mistaken, and what consequences this has for the debate about perceptual experience. I distinguish between two different ways that nonconceptualist (and conceptualist) proposals about perceptual content can be understood: as claims about the constituents that compose perceptual contents or as claims about whether a subject.

During the last fifteen years or so there has been much debate, among philosophers interested in perception, on the question of whether the representational content of perceptual experience is conceptual or nonconceptual. Recently, however, a number of philosophers have challenged the terms of this debate, arguing that one of its most basic assumptions is mistaken. Experience, they claim, does not have representational content at all. On the kind of approach they suggest, having a perceptual experience is not to be understood on the model of thought or belief, as a matter of the subject's taking things in the world to be this or that way, or of having this or that feature. Nor is it to be understood on the model of receiving testimony about how things are in the world, as a matter of its being represented to us that things are this or that way. Rather, it is simply a matter of our being presented with things. Having a perceptual experience of an object is a matter of our standing in a certain kind of relation to it which makes it available to us to be represented in thought or belief, but which does not itself involve our representing it, or its being represented to us.1 Much of the motivation for rejecting the view that experience has representational content springs from a concern to do justice to what is distinctive about perceptual experience in contrast to thought and belief. In particular, perceptual experience seems to be more "primitive" than thought, in that it seems natural to appeal to the character of perceptual experience to explain the possibility of thought about objects rather than the other way around. There is thus a concern that we will deprive..

I argue that any account of perceptual experience should satisfy the following two desiderata. First, it should account for the particularity of perceptual experience, that is, it should account for the mind-independent object of an experience making a difference to individuating the experience. Second, it should explain the possibility that perceptual relations to distinct environments could yield subjectively indistinguishable experiences. Relational views of perceptual experience can easily satisfy the first but not the second desideratum. Representational views can easily satisfy the second but not the first desideratum. I argue that to satisfy both desiderata perceptual experience is best conceived of as fundamentally both relational and representational. I develop a view of perceptual experience that synthesizes the virtues of relationalism and representationalism, by arguing that perceptual content is constituted by potentially gappy de re modes of presentation.

Much contemporary discussion of perceptual experience can be traced to two observations. The first is that perception seems to put us in direct contact with the world around us: when perception is successful, we come to recognize— immediately—that certain objects have certain properties. The second is that perceptual experience may fail to provide such knowledge: when we fall prey to illusion or hallucination, the way things appear may differ radically from the way things actually are. For much of the twentieth century, many of the most important discussions of perceptual experience could be fruitfully understood as responses to this pair of observations.

Recently, the thesis that experience is fundamentally a matter of representing the world as being a certain way has been questioned by austere relationalists. I defend this thesis by developing a view of perceptual content that avoids their objections. I will argue that on a relational understanding of perceptual content, the fundamental insights of austere relationalism do not compete with perceptual experience being representational. As it will show that most objections to the thesis that experience has content apply only to accounts of perceptual content on which perceptual relations to the world play no explanatory role. With austere relationalists, I will argue that perceptual experience is fundamentally relational. But against austere relationalists, I will argue that it is fundamentally both relational and representational.

One of the traditional problems of philosophy is the nature of the connection between perceptual experience and empirical knowledge. That there is an intimate connection between the two is rarely doubted. Three case studies of visual deficits due to brain damage are used to motivate the claim that perceptual experience is neither necessary nor sufficient for perceptual knowledge. Acceptance of this claim leaves a mystery as to the epistemic role, if any, of perceptual experience. It is argued that one function of perceptual experience is to provide information about the sources of beliefs, both as to which perceptual modality and within a given modality. This information is useful in assessing the reliability of perceptual beliefs.