Performative contradiction

A performative contradiction (German: performativer Widerspruch) arises when a speech-act rests on non-contingent presuppositions that contradict the proposition asserted in that speech-act.

The term was coined by Jürgen Habermas and Karl-Otto Apel, who attribute the first elaboration of the concent to Jaakko Hintikka, in his analysis of Descartes' cogito ergo sum argument. Hintikka concluding that cogito ergo sum relies on performance rather than logical inference.

Habermas claims that post-modernism's epistemological relativism suffers from a performative contradiction. Hans-Hermann Hoppe claims in his theory of discourse ethics that arguing against self-ownership results in a performative contradiction.