"Kantian Logic" starts from the logic lessons of 1765-66 and from the "Critique of Pure Reason" to analyze the concept and use of in Kant: transcendental and metalogical. Kant introduced traditional metaphysical problems such as truth and the objectivity of knowledge into the logical field. Logic had to worry about discovering the area of "objective possibility", and even making it the problem that had always put it in trouble, and becoming "logic of truth" and, where it could, "logic of illusion" . Always "critical and transcendental".