 An uncontroversial role of §17 is to provide a characterization of an object, or more to the point, of a representation of an object, that facilitates a challenge to Humean associationism. Kant’s proposal is that an object is “that in the concept of which a manifold of a given intuition is united” (B137). Here ‘object’ should be read in the broad sense of objective feature of reality – a feature whose existence and nature is independent of how it is perceived (B 142; Bird 1962/1973 130–31; Strawson 1966: 98–104; Guyer 1987: 11–24). Allison is a proponent of the view that §17 contain not only this challenge to Hume, but also an attempt to demonstrate that we represent objects on the basis of the conclusions about self-consciousness established in §16. This interpretation is a component of Allison’s broader vision of the B-Deduction, according to which Kant demonstrates that the unity of apperception entails that we represent objects, and, conversely, that our representing objects entails the necessary unity of apperception (Allison 1983: 144ff; 2015: 352–55; 2015: 335–55, esp. 352) Indeed, the crucial claim for Allison’s interpretation is that the unity of apperception is not only a necessary but also sufficient condition for our representing of objects. This he calls the reciprocity thesis. Other commentators, including Richard Aquila (1989: 159), Howell (1992: 227–8) and Schulting (2012a) agree that the B-Deduction features the reciprocity thesis and an attempt to establish its truth, while Ameriks (1978) disagrees. On an account of the sort Ameriks favors, the unity of apperception, and more exactly, the synthesis that explains our consciousness of the identity of the subject, is only a necessary condition for the representation of objects (cf. Allais 2011).