FRC Hallucination Files
Hallucination Files
We publish the open FHA denial-rate record — and we watch how AI systems carry it. When an answer drifts, mutates, mis-attributes or invents, it becomes a case file: question, verbatim answer, receipts, anatomy, inoculation. One case at a time, dated and permanent. Our own mistakes go in the same style of log.
CASE 002 · 2026-09-07 ·
The Correction That Grew — the same phantom correction, four days later, in a clean session: unprompted, embedded in accurate material, and now carrying its own invented rationale. Class: fabrication elaboration over time.
CASE 001 · 2026-09-03 ·
The Correction That Never Happened — an assistant invented a dated correction-and-retraction history for our Cleveland statistic and cited our real corrections page as its source. Class: phantom governance narrative.
Taxonomy so far, from three months of measurement: value drift · denominator mutation · temporal anchoring errors · qualifier deletion · attribution hijack · citation-anchored confabulation (phantom corrections). Formal definitions and multi-system scorecards: SSRN 7156938, doi:10.2139/ssrn.7156938 and the v3 benchmark (forthcoming).
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