Consider the abolition of slavery: legal systems once codified it, then reformers argued it was wrong in itself, not merely inefficient. That moral "ought" outran the law. The other side says secular legal systems handle obligation daily, but they enforce rules; they don't explain why we feel bound by a standard beyond majority vote. Kant's point stands: obligation feels categorical, not prudential. Contradictory revelations are a real limit on certainty, I grant, but they don't erase the better explanation. A rational ground of moral order, like Aristotle's unmoved mover, still explains that experience more simply than illusion plus coincidence.