This document discusses referring expressions and definiteness in linguistics. It defines referring expressions as language used to refer to something specific, while definiteness refers to whether an expression is used referentially depending on context. Key points include:
- Referring expressions can be single words or phrases and depend on the speaker having a specific referent in mind.
- Whether an expression is referring depends on linguistic and utterance context.
- Definite noun phrases like names or pronouns are usually referring but can be non-referring in some contexts.
- Opacity and equative sentences involve substitution of referring expressions and identity of referents.