 A different strand of thought in analytic philosophy—pressed by Wittgenstein in Philosophical Investigations and developed by others, including  Peter Strawson  and  John Austin—also  suggested that a single sentence could be used (on different occasions) to express different kinds of propositions. Strawson (1950) argued that pace Russell, a speaker could use an instance of ‘The F is G’ to express a singular proposition about a specific individual: namely, the F in the context at hand. According to Strawson, sentences themselves do not have truth conditions, since sentences (as opposed to speakers) do not express propositions; and speakers can use ‘The boy is tall’ to express a proposition with the contextually relevant boy as a constituent. Donnellan (1966) went on to argue that a speaker could even use an instance of ‘The F is G’ to express a singular proposition about an individual that isn’t an F; see the entry on  reference.  Such considerations, which have received a great deal of attention in recent discussions of context dependence, suggested that relations between natural language sentences and propositions are (at best) very complex and mediated by speakers’ intentions. All of which made it seem that such relations are far more tenuous than the pre-Fregean tradition suggested. This bolstered the Quine/Carnap idea that questions about the structure of premises and conclusions are really questions about how we should talk (when trying to describe the world), much as logic itself seems to be more concerned with how we should infer than with how we do infer. From this perspective, the connections between logic and grammar seemed rather shallow; see Iacona (2018) for extended discussion.