The document discusses key concepts from post-structuralist philosophy, including constitutive theories, anti-foundational theories, discourse, genealogy, deconstruction, double reading, and intertextuality. It explains that post-structuralist thinkers see language and concepts as constructing reality rather than just describing an objective world, and seek to uncover the power dynamics and assumptions behind dominant ways of thinking. Theorists discussed include Foucault, Derrida, Kristeva, and Lyotard, along with some of their main ideas around how power shapes knowledge, the instability of language, and texts being interrelated.