International audienceEpistemological important changes have taken place over the last twenty years under Western thought, due to remarkable advances of research in certain disciplines such as philosophy of knowledge, moral philosophy, cognitive science and ethology. It seems we have entered a postdualist era where major traditional binarisms are undermined: the man and his activities, including language, are now seen more as environment data than as a specific system which transcends nature. Some postdualist reflections and data can be mobilized in a linguistic theory of discourse and can afford to change and enrich the notions of subject, context and language. The article intends to show it from the two examples of the material dimension ...