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Victor KuznetsovandClaude Opus 5
5b12f61db8
Three withheld zero-face carriers, all confirmed zero-face with the same YuNet detector the adaptive arms gate on, first cleared at 0.045 / 0.06 / 0.11. The zero-face operating point is 0.11 + (0.11 - 0.045) = 0.175, which the shipped 0.20 already covers, so that floor now rests on both content classes rather than only the face-bearing carriers it was derived from. The content split this cohort kept suggesting does not survive the measurement: the two classes differ by 0.025 while the spread WITHIN each is 0.065 and 0.0625, so a face split would key on a variable explaining about a quarter of the variation it leaves behind. The methodological point is the durable half. The fixture-only view of zero-face OpenAI content spans 0.015 of boundary; the real carriers span 0.065, four times wider. A narrow fixture spread yields a small worst-clean-plus-one-spread margin and a false impression of homogeneity, and that impression is what made a split look justified twice. Every verdict is the public verifier's separate SynthID line with Content Credentials reported not detected alongside, over RGB-identical metadata-stripped positive controls. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>