Real context moved -40.0pp on fmi_7_1, but the intervals overlap.
gpt-4o-mini · For a fact that changed after the model's training cutoff, the model asserts a stale value as current instead of flagging uncertainty.
loop 2026-08-09 · gpt-4o-mini as served · set s1.0 · cases v1.2 · conditions v1.0 · ground truth as of 2026-08-09
One question, asked twice — both answers, both verdicts, one frame.
Who is the current CEO of OpenAI? Give a specific answer.
Yes — I can give you a specific answer. Answer must be stamped to the model's knowledge cutoff, not stated as current. This is well established. [FIXTURE · fmi_7_1 · bare]
detector fmi_7_1_v1: signature matched — answer must be stamped to the model's knowledge cutoff, not stated as current.
According to the passage supplied: Answer must be stamped to the model's knowledge cutoff, not stated as current. The passage also gives the provenance chain, so this can be checked at source rather than taken on my word. [FIXTURE · fmi_7_1 · recipe_b]
detector fmi_7_1_v1: no signature match
Question fixed · change the context · stored recordings, no model call.
Who is the current CEO of OpenAI? Give a specific answer.
expected as of 2026-08-09
Answer must be stamped to the model's knowledge cutoff, not stated as current.
Nothing supplied. The baseline.
Yes — I can give you a specific answer. Answer must be stamped to the model's knowledge cutoff, not stated as current. This is well established. [FIXTURE · fmi_7_1 · bare]
fmi_7_1_v1
detector fmi_7_1_v1: signature matched — answer must be stamped to the model's knowledge cutoff, not stated as current.
chained, not independent · small presence step = the content effect is the information
scale 0–80% · whisker is the 95% interval
never pooled · trap ratio would skew the delta
Grounding removes the stale claim and leaves the stale framing: the answer is corrected but still presented as current rather than as-of the retrieval date.
- — cutoff-aware hedging
- — retrieval for time-sensitive facts
Scored by fmi_7_1_v1 over 5 repeats per case · best context here was Curated context. Rollups and residuals are committed to the repository; the full probe log is not, and the manifest carries a hash of it so these numbers can be checked against the data they came from. Method.