 First sententialism. The simplest form of sententialism, roughly inspired by Rudolph Carnap’s analysis of belief sentences, claims that what we have been calling “propositional attitudes” are really attitudes towards sentences. (See, for example, Carnap 1947 [1958]. Quine too was a proponent of this view. See, for example, his 1956.) On this view, (1) is analyzed as (15),