# EXTERNAL BAR — `owned-3d-end-effect`

## The lab's own F2 line (verbatim, `CROWN_JEWELS_RESOLVED.md:119` at commit `cb6d9d7d`)

> **F2 — what would move the third-party axis to A.** Axis B — a system Genesis does not own already grades this one: an independent FastCap N=8 cross-check is stored in the witness (0.80%/1.04%), not re-run by the gate; no pre-registered bar (bar recorded: `in-witness`). To reach axis A, that same external system must be run against a bar **pre-registered before the run** and its own output cited. Today only Gate 97 (FastCap) and Gate 133 (Touchstone) sit under a content-sealed bar, and `PEER_REVIEW_2026-09.md:20-23` records axis A = 0 across this register.

## What an independent party would have to do to move this entry to axis A

1. **Pre-register the bar before the run.** State the exact references and tolerances in advance: the isolated
   sphere (C = 4*pi*eps0*R), the two-sphere Kelvin image series, the long coax per-unit-length capacitance, and the
   2-D limit of a long via pair. Also fix the canonical end-fraction geometry (d70/p350/t300 um) and the value to
   test (about 0.40). Seal the bar.
2. **Run an independent 3-D solver on the same geometries.** FastCap (the gate already carries an N=8 cross-check),
   or any other BEM/FEM electrostatic solver Genesis does not own, on the committed layouts. Publish its capacitance
   matrices beside the gate's.
3. **What they need.** A workstation; the gate itself runs in about a minute, and a FastCap build adds minutes. The
   data is the files listed in `INPUTS.sha256`. Tools: numpy, scipy, mpmath, optionally FastCap 2.0.

## What would falsify the claim

- A solver answer that differs from an exact reference by more than the pre-registered tolerance. This packet's
  `DEFECT.json` does exactly that, with a 1% error in the permittivity constant.
- An independent 3-D solver whose canonical end-fraction disagrees with 0.40 beyond its own discretisation error.
- A FastCap cross-check whose diagonal or dominant off-diagonal error exceeds the gate's 1.5% / 3% bars.