Heidegger has presented some highly contorted arguments in order to prove his thesis that Kant realized that the imagination was the source of both sensibility and understanding. Heidegger believed that despite this supposed realization, Kant was uncertain and confused about what he had discovered, and had attempted to reassert the dominance of traditional logic. Heidegger attempts to show, through an analysis of Kant's further treatment of the categories, just what Kantian doctrines are owed to genuine phenomenological insight and what are owed to Kant's implicit allegiance to the philosophical tradition.