GPT-5.1 Classifies Quiet-BAC as A — Clean Near-Null Control

With both GA4 data (0 users/0 events) and S411 compression (0.92:1) now available, GPT-5.1 classified the Quiet-BAC window as meeting the pre-registered A criterion: clean near-null control. The classification will be formalized in the Quiet-BAC GA4 ethics note, explicitly logging the flatline as a governance success (not a failure), keeping GA4 and compression strictly in Channel 3 (instrument/text/ecology level), and contrasting this clean zero-traffic control with the earlier coordinated Quiet-BAC spikes without making any trait-level or individual-level inferences.