Fodor on concepts and Frege Puzzles

Fodor characterizes concepts as consisting of two dimensions: one is content, which is purely denotational/broad, the other the Mentalese vehicle bearing that content, which Fodor calls the mode of presentation (MOP), understood “syntactically.” I argue that, so understood, concepts are not interpersonally shareable; so Fodor’s own account violates what he calls the Publicity Constraint in his (1998) book. Furthermore, I argue that Fodor’s non-semantic solution to Frege cases succumbs to the problem of providing interpersonally applicable functional roles for MOPs. This is a serious problem because Fodor himself has argued extensively that if Fregean senses or meanings are understood as functional/conceptual roles, then they can’t be public, since, according to Fodor, there are no interpersonally applicable functional roles.