This document discusses theories of language philosophy, including sense, intention, and speech acts. It covers Grice's program, which distinguishes sentence meaning from speaker's meaning. Sentence meaning concerns the literal definition, while speaker's meaning involves the information the speaker intends to convey. The document also discusses Searle's modifications regarding illocutionary intentions, which produce extra meaning based on literal meaning, and perlocutionary intentions, which involve effects on the hearer based on circumstances. Examples of speech acts are provided to illustrate these concepts.