Abstract

In this paper I do four things. (1) I explain one clear thing that ‘the problem of the unity of the proposition’ might mean. (2) I lay out a few different versions of the theory of propositions as cognitive acts, and explain why this problem arises for the version of that theory which has been defended in different forms by Peter Hanks and Scott Soames. (3) I argue that the natural ways in which the act theorist might try to solve the problem fail to solve it; (4) I propose a way to fix the problem, and then I explain how the problem re-emerges in the act theorist’s treatment of propositional attitude relations.