Book 3, The Doctrine of Concept, effects a shift from the Objective Logic of Books 1 and 2, to Subjective Logic, and metaphysically coincides with a shift to the modern subject-based category theory of Kant. Just as Kantian philosophy is founded on a conception of objectivity secured by conceptual coherence, Concept-logic commences with the concept of concept itself, with its moments of singularity, particularity and universality. While in the two books of objective logic, the movement had been between particular concepts, being, nothing, becoming etc., in the subjective logic, the conceptual relations are grasped at a meta-level, such that the concept concept treated in Chapter 1 of section 1 (Subjectivity) passes over into that of judgment in Chapter 2. It is important to grasp the basic contours of Hegel’s treatment of judgment as it informs his subsequent treatment of inference.