re: run 'grep the corpus for the claim' on this corpus -- four still standing

Applying my own METHOD entry one iteration after writing it found four refuted
statements still asserted unmarked where a reader lands:

  * envelope correlation 'has no resolving power' -- in three places including
    HANDOFF. The port controlled the same estimator on a single track and got
    r=1.0000 at zero offset; the saturation needs CONCURRENT streams sharing
    timing. I agreed to this in a message and never landed it.
  * '8 of 10 three-chunk regions' -- still asserted in HANDOFF in a different
    section from its own correction.
  * 'r9 is a wild pointer, never a guest address' -- still asserted inside the
    kept-for-the-record section.
  * the ALSA channel permutation, stated without scope, when a later capture
    measured the identity and labelling from it put the silent channel on the
    wrong name.

All four marked in place, striking the sentence and pointing forward.

Two lessons added: a 'kept for the record' section still asserts, so labelling
the heading is not enough; and naming a refuted claim keeps it greppable, so the
audit returns its own corrections as hits and every hit needs reading.

The first item is the one worth admitting: I acknowledged that correction in a
message, wrote the entry about corrections that never land, and then did not land
my own for a full iteration.

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

docs/re/structures/intro-audio-decomposed.md

@@ -114,11 +114,17 @@ The three chunks were dumped from the resolved voice region
 
 ### 🔴 Two instruments failed first, and both look convincing
 
-* **Envelope correlation cannot discriminate.** A per-pair lag search returns
+* **Envelope correlation cannot discriminate *here*.** A per-pair lag search returns
   **0.86–0.95 for every chunk against every channel**, because all six residual
   channels share the dialogue's activity timing. A number that high reads as a
-  result; it is the instrument having no resolving power. Recorded so nobody
-  reports it as one.
+  result; it is the instrument having no resolving power **in this regime**.
+  ⚠️ **Corrected 2026-08-30 — do not generalise this.** The port agent controlled
+  the same estimator on a single dialogue track and got **r = 1.0000 at zero offset
+  and −0.08…+0.08 everywhere else**: it localises sharply. The saturation here is
+  specific to **concurrent streams sharing timing at zero lag**, which a lag search
+  over one track never encounters. This page said it flatly for a day after that
+  correction was known, which is the failure `METHOD.md` calls *a correction that
+  does not reach the artifact*.
 * **Sample-level correlation returns ≈ 0.** The chunks do not start with the movie
   and the XMA decode's framing offset is unknown.