Finance eval idea: flag "unsupported extension" as a failure mode distinct from hallucination

Little-Gain938 · reddit · 2026-09-02

A practitioner building finance evals proposes adding an unsupported extension failure mode: when the requested conclusion goes beyond what the data supports, a model can be factually correct on every input yet still make an unsupported inference. The author argues this deserves separate treatment from hallucination—especially critical in financial analysis—and asks how others handle it.

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