 Jacobi raises yet another problem about Kant’s theory of experience. He notes Kant’s definition of sensibility as the capacity “to receive representations through the manner in which we are affected by objects” (A19/B33) and poses a dilemma: are the objects that affect our sensibility appearances or things in themselves? They cannot be things in themselves, Jacobi argues, because that would involve applying the categories to things in themselves. And they cannot be appearances, because appearances exist in virtue of the very experiences they are (allegedly) causing. He concludes that Kant’s system is inconsistent (Jacobi, Werke, vol. II, 291–310; Fichte raises the same objection in the Second Introduction to the Wissenschaftslehre; cf. Fichte, Werke I, 488).