Propositional attitude sentences, such as (1) Pierre believes that snow is white,have proved to be formidably difficult to account for in a semantic theory. It is generally agreed that the that-clause ‘that snow is white’ purports to refer to the proposition that snow is white, but no agreement has been reached on what this proposition is. Sententialism is a semantic theory which tries to undermine the very enterprise of understanding what proposition is referred to in (1): according to sententialists, in (1) reference is made to the sentence ‘Snow is white’. Sententialism is generally considered doomed. The two main reasons why are the famous translation argument, first suggested by Alonzo Church, and a problem raised by Stephen Schiffer.T...