Heidegger on the ontological significance of the principle of noncontradiction

Abstract

The aim of this article is to break down to its principal arguments the abundant material recently published in Heidegger’s Gesamtausgabe related to a conference given in December 1932 on the principle of noncontradiction (PNC). I will first highlight the importance in phenomenology of a correct interpretation of the PNC and then explain Heidegger’s general strategy toward logical principles during the 1920s. After showing that Heidegger’s 1932 interpretation of the PNC still pertains to Being and Time’s fundamental ontology, I will present Heidegger’s reading of Aristotle’s Metaphysics Γ 3 and 4 that is the center of the conference. I will conclude by showing how the ontological significance of the PNC makes sense in the fundamental-ontological context in which the understanding-of-being serves as the condition of possibility of our encounter with entities.