This chapter explains how Kant thinks that synthetic metaphysical principles can be made out to be true. Kant argues that since judgments which are to furnish knowledge of things generally can be verified neither empirically nor as analytic judgments are verified; they can be verified only by recourse to conditions of obtaining knowledge of things generally. Although categorial concepts by themselves do not enlarge knowledge, Kant urges that they supply the clue to finding metaphysical principles. Kant points out that it is only the judgments by which empirical knowledge is got by which we directly obtain knowledge of things. Kant points out that the connection thought by a hypothetical judgment differs from that thought by a categorical judgment; that thought by a universal judgment differs from that thought by a particular judgment. Kant maintains that metaphysics can verify categorial principles only by ascertaining a priori the temporal determinations that serve for each of the several categories.