 Corresponding to the fundamental priority that he ascribes to judgment, Kant begins with the observation that only once there is judgment can there be error: “It is correctly said that the senses do not err; yet not because they always judge correctly, but because they do not judge at all” (A293). For example, there is no error involved in the impressions of a dream, however confused or fantastical they may be. But if someone were to get confused about her dreamed experience, and suppose that it had really happened, then she would be making a judgment—and a false one too. So Kant claims, “error is only effected through the unnoticed influence of sensibility on understanding, through which it happens that the subjective grounds of the judgment join with the objective ones” (A294). In the example, someone confuses a subjective ground of judgment (“I had this dream”) with an objective one (“these events took place”). As Kant puts it in the Prolegomena: “The difference between truth and dream… is not decided through the quality of the representations that are referred to objects, for they are the same in both, but through their connection according to rules that determine the combination of representations in the concept of an object, and how far they can or cannot stand together in one experience.” (4:290)