Derrida did not quarrel with Heidegger's position that history, as perceived in the philosophic tradition was over; only that Heidegger himself had not escaped it. Derrida raised the question of what there was to say after philosophy was over (but ironically still in place, because reason is absolute and can only be questioned in its own terms). The strategy he chose was duplicity, the playing of a double game. He would operate in the language of reason, since there was no other, but try to lay traps for it by posing it problems it could not answer, exposing the inherent contradictions in apparently reasonable positions. He called this strategy deconstruction, after Heidegger's term destruktion.