re: the main menu has no idle self-return -- and four of my own durations were a backlog

Two results and one retraction, all from the same session.

REFUTED: 'an ~8-10 s idle returns to the title' does not apply to the main menu.
Held untouched it stayed put for >= 60 s, correlation never leaving
0.9245-0.9249. That timer is real but belongs to the TITLE. It was the only
reason 'B leaves the main menu' was classed as authored, so Q5's B rule is
upgraded to measured-ordering: B is delivered (canary logs vk=5801) and is the
only input in >= 100 s before the return.

The PRESS (A) plate: the boot title presents build 4 WITHOUT the plate first --
green-glyph 154, against 159 on the committed no-plate capture and 753/977/1493
on plate titles -- and the plate arrives after. That is the port's third option.

RETRACTED: four durations taken the same day. classify_array costs 1503 ms per
frame; running it per frame against an 8 fps x11grab drained the pipe at
0.64 fps, so every classified frame was stale and increasingly so. It
manufactured 'plate 24.66 s after the title art', 'B->title 15.58 s', 'B->title
25.60 s' and 'A->menu 20.26 s'. The tell: a transition, a press and a fade do
not share a duration, and the two B figures GREW across a longer run.

A backlog preserves ordering and destroys durations, which is why the sequence
results above stand and every timing does not. The ring's period is unaffected
and that was checked, not assumed -- ring_period ran at 15.03 fps against a
requested 15.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KNR5Y79D1T4bBr6gJQaWFP

docs/re/REFUTED.md

@@ -617,3 +617,35 @@ neighbourhood, not just the line.
   `10 144 of 10 148 references resolve`) → **withdrawn; it is on the disc.** It is
   the `GP_STAGE_CLEAR` child the same scan named `8AX`. With the name decoded the
   count is **10 148 of 10 148**. [`ratc-child-names.md`](structures/ratc-child-names.md)
+
+## The oracle harness and the container (2026-08-29)
+
+* "the decoder container has no disc" → **refuted the same day.** The container
+  was replaced and `/disc` is a real 6.2 GB read-only mount. Worse, both
+  instruments behind the claim were blind to the answer either way:
+  `find / -xdev` **cannot cross** into a bind mount on another device, and
+  `sylph-doctor` only checks `/work` and never `$SYLPHEED_DISC`. "sylph-doctor
+  agrees" was two instruments sharing one blind spot.
+  → To test for the disc, ask the variable that names it:
+  `sylpheed-cli screen list "$SYLPHEED_DISC/dat/GP_TITLE.pak"`.
+* "the main menu returns to the title on its own after ~8–10 s idle" → **refuted.**
+  The menu sat untouched for **≥ 60 s** without moving (correlation never leaving
+  0.9245–0.9249). The ~8–10 s idle is real but belongs to the **title**. This was
+  the only reason "Ⓑ leaves the main menu" was classed as authored.
+* "whole-image statistics (green / white / mean) can tell the title from the
+  attract movie" → **refuted.** A frame of `ADV.wmv` with a bright green laser
+  reads green 0.0018 / white 0.086 / mean (53,67,76) — the title's numbers. A
+  probe built on it tapped Ⓐ into the movie and waited 120 s for a menu that was
+  never coming. → Correlate against a committed capture instead, and keep movie
+  frames as the negative controls.
+* "a 360-bin angular cross-correlation can measure the focus ring's rotation
+  angle" → **refuted by its own control**: a synthetic **30°** rotation of a live
+  frame came back as **0°** (peak 0.596), while 90/180/270° came back exactly
+  (peak 1.000) — it only resolves exact pixel permutations. No angle was quoted;
+  the spin was established from brightness conservation instead.
+* "a latency read off a classified `x11grab` stream is a duration" → **refuted.**
+  At 1503 ms per classification against an 8 fps stream the consumer ran at
+  0.64 fps, so frames were stale and increasingly so. Four "durations" died with
+  it. The tell was that a screen transition, a button press and a plate fade all
+  came out at ~20–25 s. → A backlog **preserves ordering and destroys
+  durations**; check consumed-fps against requested-fps before quoting a time.