Frege also made a different kind of contribution, which would prove important, to the study of propositions. In early work, he spoke as though propositional constituents were the relevant functions and (ordered n-tuples of) entities that such functions map to truth-values. But he later refined this view in light of his distinction between Sinn and Bedeutung; see the entry on Frege. The Sinn of an expression was said to be a “way of presenting” the corresponding Bedeutung, which might be an ent