  Then we get to the second chapter of the Transcendental Logic, the brilliant and baffling Transcendental Deduction (TD). Recall the two movements just discussed, the one from experience to its conditions and the one from Aristotelian functions of judgment to the concepts that we must use in all judging (the Categories). This duality led Kant to his famous question of right (quid juris) (A84=B116): with what right do we apply the Categories, which are not acquired from experience, to the contents of experience? (A85=B117). Kant’s problem here is not as arcane as it might seem. It reflects an important question: How is it that the world as we experience it conforms to our logic? In briefest form, Kant thought that the trick to showing how it is possible for the Categories to apply to experience is to show that it is necessary that they apply  (A97).[4] 