Preflight (A0): 2026-07-10 18:25 โ load1 3.15/32c (falling vs load15 3.97) ยท no heavy nasimubd jobs ยท 35 GiB avail, si/soโ0 ยท all four services active โ ALL PASS. Sync: main up-to-date, worktree 0 behind. One capped run (0.34 min), readonly=2 loader, rank-array permutations of real data (03c). Pool: 123/132 features surviving the availability screen across all 8 windows.
| Leg | Reading | Ruling |
| E1 โ substitution certainty (the only exactness that survives tie-breaking) | Full readout recomputed with the target column replaced by the twin's bytes โ bit-equal for every feature at every p | PASS |
| E2 โ the dial law at the door (p is RBO's free parameter) | p โ {0.90, 0.95, 0.98}: cross-feature Spearman 0.997 / 0.997 between adjacent values โ the top-weighting knob does not reshuffle who counts as stable | PASS |
| E3 โ reality vs the rank-shuffle null | Observed mean top-weighted consistency 0.00634 vs K=199 null 97.5th 0.00156 โ 4.07ร; not degenerate | PASS |
| Verdict (row 90) | EXAM PASS (first form) โ the decisive M3 fight is named: the k_v incumbent shadow (the beat-the-incumbent feed flag) |
Iteration 79 ยท 2026-07-10 ยท CHECKPOINT (row 90) โ H-070 EXAM PASS ยท capped (0.34 min) ยท readonly=2 ยท zero generated values ยท zero code reuse ยท append-only ยท evidence: rbo_exam.py ยท rbo_exam_results.json