Honest-Abstention Protocol Validation — 0.9999 Sync Fidelity
How V131 checks whether a measurement meets its acceptance criteria, and when the system should withhold a result.
V131-S01 PROTOCOL VALIDATION — VERIFIED HONEST ABSTENTION | JUNE 2026
01. PROTOCOL VALIDATION — A SYSTEM THAT NEVER CONFIDENTLY LIES
Two-Gate Honest Abstention, Fault-Injection Verified
Commit when certain • abstain when not • proven to block real anomalies
S01 Physical Anchor | 0.9999 sync fidelity | abstained-step residual 3.8× higher | 0% abstention on healthy links
The V131-S01 protocol reaches 0.9999 phase-locked synchronization fidelity via the S01 Physical Anchor and cubic-spline coherence normalization, with direct SoC hardware capture eliminating probabilistic drift. On top of that deterministic foundation sits a two-gate honest-abstention layer: the system commits a result only when the evidence supports it, and abstains otherwise — rather than emitting a confident guess.
01.1 THE TWO GATES
| Gate | Trigger | Offline commit / abstain |
|---|---|---|
| Residual-aware | residual > rolling median + k·MAD | 94.4% / 5.6% — abstained residual 3.77× higher |
| Link-quality | BER > 0 or coherence < floor | healthy link → 0% abstention |
01.2 BOARD-IN-LOOP (LIVE HARDWARE)
Run in the loop on the live board, the residual-aware gate commits 93.6% / abstains 6.4%, with abstained-step residual 3.88× higher — consistent with the offline result. On a healthy encrypted link (coherence 72–82%, BER = 0) the link-quality gate holds a 0% abstention baseline: it stays quiet when the channel is clean.
01.3 GATE LOGIC — VERIFIED, NOT JUST ARMED
A gate that never fires is worthless. Under deliberate fault injection (forced link failure across a fixed frame window), the gates demonstrably respond: link-quality abstention jumps to 50–75% during the fault, residual abstention rises in step, and healthy segments stay at 0%. The gates are verified to block real anomalies when they arrive — not merely armed and hoping.