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digital-drosophila/registry/catalog-20260929/evidence/phase4y-dpm-hypothesis/REPORT.md
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Phase 4Y — independent DPM fast-current hypotheses

Status: COMPLETE-EXPERIMENTAL-HYPOTHESIS-AUDIT. No candidate selection, training, game integration or frozen baseline changes. All conditions use identical PN forcing for 120ms, then off to 1000ms. Six old odors, one old seed and one new seed. Not a population-level independent generalization gate. Factors 0 and -1 are diagnostic model interventions, not corrections to raw labels or validated receptor-specific physiology. Only actual outgoing DPM effective currents change in RAM. Graph and raw counts stay intact.

KC condition late spike range (12 trials)
59832 DPM_fast_current_off 0–0
59832 DPM_fast_current_reversed 0–0
59832 frozen_reference 13–17
78836 DPM_fast_current_off 0–0
78836 DPM_fast_current_reversed 0–0
78836 frozen_reference 39–40
82312 DPM_fast_current_off 60–61
82312 DPM_fast_current_reversed 60–61
82312 frozen_reference 60–61
condition mean whole-brain spikes mean late KC spikes mean late active KC
DPM_fast_current_off 977991.17 61.42 1.33
DPM_fast_current_reversed 969600.33 61.75 1.42
frozen_reference 1107350.25 116.33 3.50

Exact controls: six Phase4V original trials, six repeats, five frozen reference trials, unchanged in-memory base hash and restored frozen overlay. Finite states do not establish biological stability. No calibrated runaway threshold, biological sign conclusion, receptor kinetics or learning success is inferred. Whole-brain intervention outcomes may differ from prior isolated replay because all feedback responds. Report this difference, do not select a condition by favorable activity.