Paul Boghossian

The conviction that intentional realism requires intentional reductionism has the philosophy of mind in its grip. Thus, Jerry Fodor:.... It is worth noting — if only because it so seldom is nowadays — that this rationale for the naturalistic conviction begs a question that doesn't obviously deserve to be begged. Why, indeed, must we think that no property can be real unless it is identical with, or supervenient upon, the properties that appear in the catalogues provided by physics? There is, I think, no obvious answer.

Compatibilism combines an externalist view of mental content with a doctrine of privileged self‐knowledge. The essay presents a reductio of compatibilism by arguing that if compatibilism were true, we would be in a position to know certain facts about the world a priori, facts that no one can reasonably believe are knowable a priori. Whether this should be taken to cast doubt on externalism or privileged self‐knowledge is not discussed. Consideration is given to the ’empty case’—the case in which a thinker expresses what he takes to be a genuine thought concerning a natural kind but where there is in fact no relevant natural kind, so that the putative natural kind term fails to refer. It is argued that, in such a case, on an externalist conception of natural kind terms, the thinker is deluded in taking himself to be expressing a complete thought, and that such delusions are not compatible with privileged self‐knowledge.