Eric Taxier and Chad Jenkins discuss the two prefaces of Immanuel Kant's Critique of Pure Reason. We address the different goals and strategies of the two quite different prefaces: the 1781 original and the new preface for the 1787 revision. We discuss the way in which Kant describes Reason as insisting on going beyond what it can directly experience (and the trouble it causes itself in so doing), the notion of a critique, the things metaphysics can learn from other sciences, the importance of being in some way "rule-bound," and the question of one's grasp of the noumenal (or lack thereof).