Online research in philosophy

In this paper I am going to argue that two commonly held views about perceptual experience are incompatible and that one must be given up. The first is the view that the five senses are to be distinguished by appeal to the kind of experiences involved in perception; the second is the view – called Representationalism – that the subjective character of perceptual experience is solely determined by what the experience represents. We could take their incompatibility as a reason for rejecting Representationalism; but I will suggest that it’s open to the Representationalist to claim that the experiences of a single sense need have no common character.

When I take a sip from the coffee in my cup, I can taste that it is sweet. When I hold the cup with my hands, I can feel that it is hot. Why does the experience of feeling that the cup is hot give me justification for believing that the cup is hot?And why does the experience of tasting that the coffee is sweet give me justification for believing that the coffee is sweet?In general terms: Why is it that a sense experience that P is a source of justification—a reason—for believing that P? Call this the Question. I will discuss various answers to the Question, and defend the one I myself favor.

In The Logical Basis of Metaphysics, Dummett argues at length that Geach has been wrong in taking the sense of a predicate to be a function that sends the sense of a proper name to that of a sentence, and claims that it should instead be a means to determine the referent of the predicate, as is suggested by Frege’s sense-determines-reference (SDR) principle. This disagreement between Dummett and Geach calls for a serious investigation into two of Frege’s sense-related principles, namely the Compositionality thesis and the SDR thesis. By making precise both theses in terms of supervenience, we pin down a preferable sense of compositionality for senses, and resolve the debate in question.

Representationalist theories of sensory experience are often thought to be vulnerable to the existence of apparently non-representational differences between experiences in different sensory modalities. Seeing and hearing seem to differ in their qualia, quite apart from what they represent. The origin of this idea is perhaps Grice’s argument, in “Some Remarks on the Senses,” that the senses are distinguished by “introspectible character.” In this chapter I take the Representationalist side by putting forward an account of sense modalities which is consistent with that view and yet pays due regard to the intuition behind Grice’s argument. Employing J.J. Gibson’s distinction between exploratory and performatory behaviour, I point to a proprioceptive element in perceptual experience, and identify this as crucial in any account of what makes a particular way of perceiving a sense modality.

In his classic paper, "Some Remarks about the Senses," H. P. Grice argues that our intuitive distinction among perceptual modalities requires that the modalities be characterized in terms of the introspectible character of experience. I first show that Grice's argument provides support for the claim that perceptual experiences have qualia, namely, mental qualitative properties of experience which are what it's like to be conscious of perceived properties such as color. I then defend intentionalism about experience, which rejects qualia, by showing that we need not appeal to differences in qualia in order to distinguish the senses. Rather, I claim that we can appeal to, among other factors, differences in the physical properties of physical objects which experience represents.

This paper discusses certain problems arising within the treatment of the senses of functions in Alonzo Church's Logic of Sense and Denotation. Church understands such senses themselves to be "sense-functions," functions from sense to sense. However, the conditions he lays out under which a sense-function is to be regarded as a sense presenting another function as denotation allow for certain undesirable results given certain unusual or "deviant" sense-functions. Certain absurdities result, e.g., an argument can be found for equating any two senses of the same type. An alternative treatment of the senses of functions is discussed, and is thought to do better justice to Frege's original theory.

The character of our perceptual experience is such that it appears to be integrated or unified across different senses. If introspection were all we had to go on, we wouldn’t distinguish different senses at all, but would take ourselves to have a single sense and to simply perceive, but not see, or feel, or taste, etc.

Standard accounts of the senses attempt to answer the question how and why we count ?ve senses (the counting question); none of the standard accounts is satisfactory. Any adequate account of the senses must explain the signi?cance of the senses, that is, why distinguishing different senses matters. I provide such an explanation, and then use it as the basis for providing an account of the senses and answering the counting question.

There is a view abroad on which (a) perceptual experience has (a) representational content in this sense: in it something is represented to the perceiver as so. On the view, a perceptual experience has a face value at which it may be taken, or which may be rejected. This paper argues that that view is mistaken: there is nothing in perceptual experience which makes it so that in it anything is represented as so (except insofar as the perceiver represents things to himself as so). In that sense, the senses are silent, or, in Austin's term, dumb. Perceptual experience is not as such either veridical or delusive. It may mislead, but it does not take representation to accomplish that.

Believing is not much like premeditated intentional action, but neither is it completely reflexive. If we had no more control over believing than we have over our automatic reflexes, it would be hard to make sense of the idea of epistemic virtues. There is, after all, no excellence of the eye blink or the knee jerk. If there are epistemic virtues, then our degree of voluntary control over believing must lie somewhere between the extremes of what we experience with passive reflexes and intentional actions. Believing is not the only human activity that lies between these extremes. A number of behaviors and bodily processes do. Using some of these as a model, I will give an account of the nature of our voluntary control over believing and argue that it is necessary to ground the conviction that epistemic virtues do make sense.