Kant famously claims that autonomy is the ground of dignity. If he is correct about the grounding relationship, then doubts about our autonomy entail doubts about our dignity. Here, I attempt to show that Kant is sensitive to this problem, and invokes the ‘fact of reason’ (Faktum der Vernunft) as the key piece of evidence for our autonomy, and therefore our dignity. But as is well known, Kant’s...