Property Identity and the Supervenience Argument

Abstract

The theses and arguments with which Jaegwon Kim was most identified all crucially involve properties. Events are said to be exemplification of properties by objects at times. Supervenience, despite its many varieties, is a relation between families of properties, such that there is no difference in supervening properties without a difference in subvening, base properties. The so-called ‘supervenience’ or ‘causal exclusion’ argument is directed against nonreductive physicalism, which denies the identity of physical and mental properties. It concludes that if physicalism is true, then mental properties are only causally efficacious when they are identical to physical properties. But despite all the work properties do for Kim, there is little in his writing regarding traditional ontological views about properties, and he sometimes makes claims about property identity that are puzzling and hard to square with other claims he makes. This paper probes this neglected corner of his work, especially in regard to the supervenience argument and the fate of nonreductive physicalism.