Abstract

Externalism1 is the thesis that some propositional attitudes depend for their individuation on features of the thinker’s (social and/or physical) environment. The doctrine of self-knowledge of thoughts is the thesis that for all thinkers S and occurrent thoughts that p, S has authoritative and non-empirical knowledge of her thought that p. A much-discussed question in the literature is whether these two doctrines are compatible. In this paper I attempt to respond to one argument for an incompatibilist conclusion, Boghossian’s 1989 ‘Memory Argument.’