Critique of Pure ReasonLecture notes, January 29, 1997: Transcendental Deduction IG. J. MatteyThe production of the list of pure concepts of the understanding (categories) from the table of judgments is known as the "metaphysical deduction." It has been roundly criticized as being ad hoc, no the product of a "single principle," as Kant hand maintained. Nonetheless, we shall try to see what the principle is, in the hope that the discovery of Kant's strategy can shed some light on his overall treatment of the categories.The key point of similarity between judgments and concepts is that both introduce unityinto representations. A judgment subsumes an intuition under a concept or places one concept in the sphere of another. Thus in a categorical judgment, the subject is included in the sphere of the predicate concept. In general, Kant called the unity produced in judgments an "analytical unity," and held that there are twelve forms by which the unification takes place.
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