But what problem about the efficacy of the laws of freedom in the realm of nature could remain to be solved after the first two critiques? The Critique of Pure Reason had argued that although we can disprove the possibility of any breach in the determinism of the natural world and cannot have theoretical knowledge of the freedom of our will in the noumenal world, nevertheless we can coherently conceive of the latter. And the Critique of Practical Reason had argued that we can confidently infer t