  Whatever, no kind of empirical psychology can yield necessary truths about the mind. In the light of this limitation, how should we study the mind? Kant’s answer was: transcendental method using transcendental arguments (notions introduced earlier). If we cannot observe the connections among the denizens of inner sense to any purpose, we can study what the mind must be like and what capacities and structures (in Kant’s jargon, faculties) it must have if it is to represent things as it does. With this method we can find universally true, that is to say, ‘transcendental’ psychological propositions. We have already seen what some of them are: minds must be able to synthesize and minds must have a distinctive unity, for example. Let us turn now to these substantive claims.