Discourse refers to systems of language use and socially constructed knowledge. Discourse theory examines how language shapes social relations and power structures. Michel Foucault argued that discourses create "regimes of truth" that shape perceptions. Norman Fairclough studied the relationship between social structures, practices, and discourse. Analyzing discourses can highlight how words and texts influence identity and participation in power. However, some criticize that discourse theory is too focused on words and subjective interpretations.