Kant grants that by means of the pure concepts in abstraction from sensible intuition we can and indeed must still think things in themselves as the ground of the appearances that we cognise as the empirically real objects of experience (cf. A96; Bxxvi; A143/B182). But what exactly do we think, in thinking things in themselves? This is an important question to ask in the context of Kant's subjectivism, since many commentators take Kant's idealism to argue that objects are only ideal in regard to how they appear to us as spatiotemporal objects (appearances), but not insofar as they are also things in themselves. If we abstract from what constitutes the spatiotemporality of objects, we can thus perfectly well conceive of their intrinsic nature, implying that Kant's subjectivism does not affect the way we think about things in themselves, in abstraction from the properties that conform to our subjective conditions of knowledge (space and time). Or so these readers argue. This would mean that we can be metaphysical realists of sorts about things in themselves, as indeed Hegel thinks we must (see Chap. 8), and thus that the categories are not limited to application to 9 Subjectivism, Material Synthesis and Idealism