FDT Debate: Is the 'Logical' Label a Mistake? Decision Theory Iterates in Public
jessi_cata · x · 2026-11-10
jessicata and OrionJohnston debate functional decision theory (FDT) on X.
- jessicata argues the "FDT family" framing fails: the dependency hypotheses in FDT are not "logical" in any meaningful sense, and canonical FDT (equation 4, A-FDT) is action-based, not policy-based.
- They also expose a terminology split over "causal": expanded/non-backtracking vs. physical cause as standard in decision theory.
- Core point: if FDT itself makes the alleged error, calling your successor theory FDT or FDT-family validates that error — criticize the paper and propose an alternative under a different name.
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