This paper analyses Heidegger�s controversial advancement of Husserl�s idea of philosophy and phenomenological research towards �the BeingQuestion� and its relation to �Dasein�. It concentrates on Heidegger�s elision of Dilthey and Husserl�s different concepts of �Descriptive Psychology� in his 1925 Summer Semester lecturecourse, with Husserl�s concept losing out in the competition, as background to the formulation of �the BeingQuestion� in Being and Time (1927). It argues that Heidegger establishes his own position within phenomenology on the basis of a partial appropriation of Dilthey�s hermeneutical manner of thinking, an appropriation that was later radically called into question by Lévinas on Diltheyeanhermeneuticalphilosophical grounds.