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Moral Realism vs Anti-Realism

When we say we want AI "aligned with human values," a deep question lurks: are there objective moral truths to align to, or just preferences?

The two camps

Moral realism Anti-realism
Moral facts exist independently of us Morality is human attitude/convention
"Torture is wrong" is true like "2+2=4" "Wrong" expresses disapproval, not a fact
A smart enough AI could discover ethics There's nothing out there to discover

Why it's load-bearing for AI

  • If realism is true: a superintelligence might figure out the correct ethics on its own — but the is-ought gap suggests intelligence alone won't get it there.
  • If anti-realism is true: there is no "correct" alignment target — only somebody's values, making whose values unavoidable and CEV a way to pick.

"Align AI with morality" assumes there's a morality to align with. Whether that's a discovery or a choice changes the entire alignment project.

Related: The Is-Ought Problem · The Value Loading Problem · Coherent Extrapolated Volition