For such an author pledges himself to extend human cognition beyond all bounds of possible experience, of which I humbly admit that this wholly surpasses my capacity; instead I have to do merely with reason itself and its pure thinking; to gain exhaustive ac quaintance with them I need not seek far beyond myself, because it is in myself that I encounter them, and common logic already also gives me an example of how the simple acts of reason may be fully and systemat ically enumerated; only here the question is raised how much I may hope to settle with these simple acts if all the material and assistance of experience are taken away from me.