The purpose of the paper is to show that semanticexternalism – the thesis that contents are notdetermined by ``individualistic'' features of mentalstates – is mistaken. Externalist thinking, it isargued, rests on two mistaken assumptions: theassumption that if there is an externalist wayof describing a situation the situation exemplifiesexternalism, and the assumption that cases in which adifference in the environment of an intentional stateentails a difference in the state's intentional objectare cases in which environmental factors determine thestate's content. Exposing these mistakes (...) leads to seethat the conditions that are required for thetruth of externalism are inconsistent. (shrink)

I propose, develop and defend the view that theories of meaning — for instance, a theory specifying the logical form or truth conditions of natural language sentences — should be naturalized to scientific psychological inquiry. This involves both psychologism — the claim that semantics characterizes psychological states — and scientific naturalism — the claim that semantics will depend on the data and theories of scientific psychology. I argue that scientific psychologism is more plausible than the traditional alternative, the view that (...) a theory of meaning is a priori. After defending scientific psychologism against several objections, I offer a speculative proposal that shows how a theory of meaning can be integrated into scientific psychology. (shrink)