Abstract

This paper begins with an exposition the apparent tension between externalist theories of content and common-sense belief/desire psychology, with a view to resolving the conflict between these two views. The second part of the paper is a criticism of Fodor’s reformulation of Twin Earth type cases.I argue that this attempt to mitigate the damage such cases do to the tenability of folk psychological explanation cannot work, because Twin Earth cases pose a metaphysical problem for content and explanation, not a nomological one, as Fodor argues. I discuss this in detail, by arguing that Twin Earth cases are illustrations of a metaphysical appearance/reality distinction for content.The paper concludes with a strategy for blending content externalism with a robust folk psychology: one that centers on the distinction between causation and causal explanation.