The Alleged Turning Point in European Philosophy Existentialists, especially those who follow either Heidegger or Jaspers, find a great deal objectionable in what they variously call ‘scientism’, ‘scientific rationalism’, and ‘positivism’. In this article I shall discuss one of the alleged defects of scientific rationalism, that it recognizes only one kind of truth—the kind that existentialists call ‘objective truth’. ‘One great achievement of existential philosophy,’ writes William Barrett, ‘has been a new interpretation of the idea of truth in order to (...) point out that there are different kinds of truth, where a rigid scientific rationalism had postulated but one kind: objective scientific truth.’ Not only scientific rationalists but traditional metaphysicians from Plato to Aquinas and Hegel are judged to be equally at fault here: they too have failed to recognize any truth other than the objective variety. It was Kierkegaard who for the first time effectively challenged the assumptions shared by scientific rationalists and traditional metaphysicians. Kierkegaard, in Barrett's words, ‘had to re-open the whole question of the meaning of truth … his stand on the question may well have marked a turning point in European philosophy.’. (shrink)