re: the sweep IS drawn on the JP title -- and my gate was phase-locking the shutter

The occlusion hypothesis is refuted: build 7 draws the same three ROT strips at
higher alpha than English, so there was never an absence to explain.

The 0.32-vs-11.9 tension that motivated it was an artefact of my own instrument.
Both JP captures were shuttered on the plate pulse, and the plate's pulse is part
of the animation -- so the gate synchronises the shutter to the animation's phase.
Measured at the shutter instant, the sweep sits 25-26 px apart across two runs in
different locales and different sessions: 1.6 % of a ~1600 px traverse.

So the 0.32 I recorded as between-session capture noise measures my trigger's
repeatability, and I read it as evidence the title is still when it is evidence
the gate works. The era adjudication is unaffected -- margin 16.72 clears even the
un-locked 11.9 -- and unaffected for the reason that file already gave: correlated
noise cancels in a margin.

Refutation attempt on sylpheed-port's positional-mechanism rejection: FAILED, the
claim stands. Its residual sits inside lit logos, and the logo ROI is
byte-identical across five differently-phased frames in two sessions.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v

docs/re/REFUTED.md

@@ -715,3 +715,43 @@ reachable by the person about to repeat it.
   twice.** The same origin gives 0 and 1 to different destinations; every repeated
   *pair* is identical across five replicates. The pair determines; the origin only
   constrains. [`data/fade-four-transitions.txt`](data/fade-four-transitions.txt)
+
+### The JP title might not draw the sweep leaves at rest — ❌ REFUTED (2026-08-30, mine)
+
+I hypothesised that build 7's denser logo stack (katakana + crystalline burst)
+**occludes** the two sweep leaves, to explain why two JP title captures differ by
+RMSE 0.32 inside the adjudication box while two EN captures a plateau-phase apart
+differ by 11.9. A draw capture in `ja` (control: the same extraction on the EN
+title log) shows the **same three tall ROT strips, same dimensions, at HIGHER
+alpha than English** — 180/188/194 vs 160/168/166. There is no absence to
+explain. [data](data/title-sweep-jp-draw-capture.txt)
+
+The 0.32 had a different cause: **my own gate**. See below.
+
+### "Two sessions sample a free-running clock" — ❌ REFUTED (2026-08-30, mine)
+
+`jp-title-at-rest.txt` justified a second capture as probing the between-run axis
+"where a free-running clock lands somewhere else on a fresh boot", and reported
+its in-box **0.32 as capture noise**. Measured at the shutter instant, the sweep
+strips sit **25–26 px apart across two runs in different locales and different
+sessions** — 1.6 % of a ~1600 px traverse. The plate pulse *is* part of the
+animation, so gating on it phase-locks the shutter. **0.32 is a lower bound
+produced by the instrument, not a property of the game**; the honest figure at an
+arbitrary phase is 11.9. The era adjudication is unaffected — its margin, 16.72,
+clears even 11.9. [details](structures/plate-pulse-phase-lock.md)
+
+### Refutation attempt on `sylpheed-port` — ✅ THE CLAIM SURVIVED (2026-08-30)
+
+**Target:** the port's rejection of a positional mechanism, resting on 98 % of
+off-edge area matching exactly with a residual of ±1–2 levels *inside lit logos*.
+
+**My attempt:** if the sweep leaves' ink crosses the logos, that residual could
+be sweep ink our renderer omits — and phase-locking would have made it look
+stable across sessions rather than exposing it.
+
+**Result: refuted, the claim stands.** `jp-title-at-rest.txt` has five frames
+~1.5 s apart *within* a run — not gated individually, so genuinely different
+sweep phases — and the 350×396 logo ROI is **byte-identical across all of them
+(0 / 138 600 px differing, max |d| 0), reproduced in two independent sessions**,
+while 5–8 % of the whole frame moves as a contrast control. The sweep ink does
+not land on the logos. The ±1–2 residual is not sweep.