Heidegger's interpretation of Kant has long been seen as problematic. As an interpretation, it is far from mainstream, and this unusualness has led to harsh criticism. A central feature of the objections is the claim that Heidegger has wilfully forced Kant into seeming to be a mere precursor of Heidegger. This criticism was initiated most notably by Ernst Cassirer in his review of Kant and the Problem of Metaphysics: "Here Heidegger speaks no longer as a commentator, but as a usurper, who as it were enters with force of arms into the Kantian system in order to subjugate it and to make it serve his own problematic."¹