The document discusses several key concepts related to language and communication:
1) Discourse refers to patterns of language use, acceptable statements, and shared ideas within a community. It describes the conversations held by groups with common beliefs.
2) A speech act involves uttering words that can statement something, accomplish a task, or have an effect. There are utterance acts, illocutionary acts that do something by speaking, and perlocutionary acts that achieve voluntary or involuntary effects through speaking.
3) Deixis refers to words whose meaning depends on contextual information like time and place. Pronouns are deictic as their referents vary based on the context of an utterance.