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BFM-decomp/rules/G22.md
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# G22 -- Fix the instrument before trusting its measurement
A number from a broken tool and the same number from a fixed tool are opposite facts. Tool integrity is a precondition of a
measurement, not a parallel concern; a probe from a broken tool is not evidence.
provenance: BFM R35; "families bank at 0%" (a missing build step) that steered two phases, then measured 89%