According to Kant in the preface to its second edition, the Critique of Pure Reason (Kritik der reinen Vernunft [KrV]) "is a treatise on the method" of a future scientific metaphysics intended "to transform the previous procedure of metaphysics by attempting in it that complete revolution exemplified by geometers and natural scientists."¹ Introduced in the new preface as an essential element of this revolutionary treatise is the experiment of pure reason (Experiment der reinen Vernunft) that Kant undertakes in the "Antinomy of Pure Reason."²