 Despite the robustness of Cohen’s anti-psychologism, it is not always easy to locate in his writings. On almost every page of Kant’s Theory of Experience (and later, The Logic of Pure Knowledge) Cohen helps himself to the language of transcendental idealism and transcendental psychology, giving the impression of an active, conscious mind, with faculties of sensibility and understanding that produce the subject’s experience of objects. But, Cohen insists, this language is actually anti-psychologistic: understood properly, the Kantian’s talk of cognitive faculties really refers to the methods of mathematically precise natural science. Thus the “faculty” of sensibility is really just the methods by which the mathematician constructs spatial magnitudes, and the “faculty” of understanding is really just the most basic set of concepts the physicist uses to represent physical objects (Cohen 1885, 586ff.) Kantian theory of knowledge thus turns out to be the philosophical investigation of the methods natural science uses to represent objects.