Kant held that his critique of pure reason, by limiting the ambitions of the human faculty of knowledge, made room for sustaining disputed metaphysical claims for practical reasons. By doing that, he seemed to entitle his readers to metaphysical speculations on God, freedom and our supernatural goals. The paper examines what I take it to be the two main responses to this alleged entitlement. Some commentators find that such speculations betray the spirit of Kant’s revolutionary road, but others join Kant in his occasional metaphysical musing. I defend the coherence of the second stance, and even of its materialist version. But I argue that a materialist (Kantian) metaphysics of mind can only be mounted if the divide between phenomena and noumena is previously blurred.