All this means that the ontological analysis is bring us to the question of what we mean by truth . Again we normally think about truth in terms of judgement. Is such and such a statement true or not. But this idea of judgement, Heidegger argues, is actually dependent on a more primordial notion of truth that is a kind of showing or manifesting. The essence of the traditional notion of truth as judgement lies is adequation or correspondence.
Truth is the agreement between a statement and a state of affairs.
Heidegger does not disagree with this, rather he ask a different question. Heidegger takes the example of a man who has his back turned to the wall and who makes the true assertion that the picture on the wall is hanging askew. The truth of this statement is verified when the man turns around and the picture really is askew. Truth then is a relation to things and the demonstration or proof is that the thing shows itself as it is. The two ontological conditions for the making of judgements, therefore, is that things show themselves and that there is a being that relates to things.