The "Aesthetic" begins with a theorem that possesses neither a metaphysical nor a transcendental character (Section 1), but is crucial to the "Aesthetic" and to "Logic" as its counterpart (B 74–6): the theorem of the two stems or faculties of knowledge. This is the reason why the argument of the "Aesthetic" is prosecuted in four steps: 1. the initial statement of the theorem itself; 2. the metaphysical exposition; 3. the transcendental exposition; 4. the implication of the argument for both the theory of cognition and the theory of objects: the doctrine of transcendental idealism insofar as it bears specifically on the domain of sensibility.