Online research in philosophy

The subjective properties of an experience are those which specify what having the experience is like for its subject. The sensational properties of an experience are those of its subjective properties that it does not possess in virtue of features of the way the experience represents the world as being (its representational content). Perhaps no topic in the philosophy of mind has been more vigorously debated in the past quarter-century than whether there are any sensational properties, so conceived. The existence or otherwise of sensational properties is pivotal in assessing functionalism, representationalism, and many other conceptions of mental states and the nature of our ability to think about them. Instead of engaging in extended sentence- by-sentence dissection of these many discussions, I hope that the theses I formulate will, taken together, comprise a positive conception of sensational properties that can be drawn upon in assessing those debates. My main aim is to articulate that conception.

Christopher Peacocke has presented an original version of the perennial philosophical thesis that we can gain substantive metaphysical and epistemological insight from an analysis of our concepts. Peacocke's innovation is to look at how concepts are individuated by their possession conditions, which he believes can be specified in terms of conditions in which certain propositions containing those concepts are accepted. The ability to provide such insight is one of Peacocke's major arguments for his theory of concepts. I will critically examine this "fruitfulness" argument by looking at one philosophical problem Peacocke uses his theory to solve and treats in depth. Peacocke (1999, 2001) defines what he calls the "Integration Challenge." The challenge is to integrate our metaphysics with our epistemology by showing that they are mutually acceptable. Peacocke's key conclusion is that the Integration Challenge can be met for "epistemically individuated concepts." A good theory of content, he believes, will close the apparent gap between an account of truth for any given subject matter and an overall account of knowledge. I shall argue that there are no epistemically individuated concepts, and shall critically analyze Peacocke's arguments for their existence. I will suggest more generally that the possession conditions of concepts and their principles of individuation shed little light on the epistemology or metaphysics of things other than concepts. My broader goal is to shed light on what concepts are by showing that they are more fundamental than the sorts of cognitive and epistemic factors a leading theory uses to define them.

Christopher Peacocke, in A Study of Concepts, motivates his account of possession conditions for concepts by means of an alleged parallel with the conditions under which numbers are abstracted to give the numerosity of a predicate. There are, however, logical mistakes in Peacocke.

Roderick M. Chisholm (1916-1999) was one of the most important philosophical thinkers of the 20th century. His influence on epistemology (the theory of knowledge) and metaphysics cannot be understated; indeed, it is difficult to conceive of what these fields would be like today without the impact of Chisholm. Were there a Nobel Prize in philosophy, Chisholm surely would have won it.