请修缮这段文字要求表达要清晰语法要准确。The expository speech act is conditional The speaker makes a commitment to the expressed proposition and emphasizes that the proposition is true rather than false It is an objectiv

The expository speech act is characterized by its conditional nature. The speaker commits to the proposition being expressed and emphasizes its truthfulness. This type of speech act is objective and pertains to factual information. Typically, expository speech acts are conveyed through declarative sentence patterns and include assertions, predictions, reminders, and denials. They rely on logic and semantics to convey meaning. Representative language is a common form of advertising behavior. The author categorizes advertising language based on personal deixis, which can be either first or second person elaboration