Published online by Cambridge University Press: 28 February 2022
The language of thought hypothesis is this: central among the causes of our behavior are inner states with linguistic structure that play roughly the role we pre-scientifically ascribe to our beliefs and desires. A philosophical thesis has been proposed on the basis of that scientific hypothesis- namely, that the way to explicate commonsense notions of the content of beliefs and desires, of their intentionality, is in terms of the meaning of such internal sentences. I am going to compare this explicative strategy with a certain functionalist theory of propositional attitudes, on which propositional attitude ascriptions of the form ‘x believes (desires) that —’ are explicatively more fundamental than anything linguistic and semantic. This is a modern dress version of an old dispute; but the issue is not between the naturalistic proponent of linguistic meaning and the antinaturalistic proponent of irreducible intentionality.