The most famous concept in Nishida's philosophy is the logic of basho (Japanese: 場所; usually translated as "place" or ""), a non-dualistic concrete logic, meant to overcome the inadequacy of the subject–object distinction essential to the subject logic of Aristotle and the predicate logic of Immanuel Kant, through the affirmation of what he calls the "absolutely contradictory self-identity", a dynamic tension of opposites that, unlike the dialectical logic of Georg Wilhelm Friedrich Hegel, does not resolve in a synthesis. Rather, it defines its proper subject by maintaining the tension between affirmation and negation as opposite poles or perspectives.