The transcendental approach initiated by Immanuel Kant and Peter Strawson has been the most representative contemporary exponent of this line of thinking. Barry Stroud understands this form of transcendental argument as relying on an empirical “verification principle” and hence he rejects it as unnecessary. Nevertheless, Stroud’s view is only warranted to a certain extent. In some non-empirical objective spheres, including concepts and propositions as regards general metaphysics, moral metaphysics and philosophy of religion, the transcendental approach is still necessary. In terms of quality, transcendental approach belongs to “conceptual argumentation,” which differs from experience and logic with the fundamental characteristic of setting up a theoretical antecedent before further inquiry at the level of doctrine, i.e., concepts.