 For present purposes, we can abstract away from the details of debates about whether Quine’s overall view was plausible. Here, the important point is that claims about logical form were said to be (at least partly) claims about the kind of regimented language we should use, not claims about the propositions actually expressed with sentences of natural language. And one aspect of Quine’s view, about the kind of regimented language we should use, turned out to be especially important for subsequent discussions of logical form. For even among those who rejected the behavioristic assumptions that animated Quine’s conception of language, it was often held that logical forms are expressions of a first-order predicate calculus.