Months before Heidegger gives his phenomenological interpretations of the first Kritik, Heidegger is introducing to his students, in the Grundprobleme lectures of 1927, the problem of ontological difference, and he is doing so precisely through a destruktive meditation on Kant's categories of modality as they circumscribe the bounds of real predication. Although Heidegger had previously penetrated the Transcendental Analytic before the Phenomenological Interpretations in his 1925 Logik lectures, there it was self-evident why his examination had to limit itself in range and scope. By contrast the Phenomenological Interpretations, like the controversial Kantbuch that followed it, stood in need of some justification, and the Grundprobleme proffer that in linking the interpretation of Kant with the elaboration of the ontological difference.

¶ 7:20 PM