By and large I agree with both of your articles on Peterson. But I can’t let this scholarly mistake slide. Kant certainly did NOT believe that those internal features allowed us to deduce truths about the world. In fact, he repeatedly denies your claim that the structures of pure reason can ever tell us anything about “things in themselves“. What he does say is that we can know the truths of pure reason will always be true for every experience we can possibly have. But that’s precisely because they don’t tell us anything about things in themselves (the noumenon), but only about the appearances that we can experience (the phenomenon).