In Section 3.2, I focus on the development of semantics, which began as a collection of methodological tools for applying formal languages to philosophical problems. In Section 3.3, I trace the origins of contemporary debates about the nature of propositional content. In Section 3.4, I give a brief history of philosophical work on speech acts and pragmatics, emphasizing the origins of current debates in conflicting threads of Wittgenstein’s writing.