diff --git a/docs/re/METHOD.md b/docs/re/METHOD.md
index 96b31e1c..64dd4f6d 100644
--- a/docs/re/METHOD.md
+++ b/docs/re/METHOD.md
@@ -3096,3 +3096,25 @@ not wrong numbers**. My own worst instance — `ring_row.py`'s calibration, wron
 because it was fitted against the wrong reference rows — would still not be caught,
 because nothing had retracted it: **nobody knew it was wrong.** This closes the
 class found in their tree and not the one found in mine.
+
+## Liveness has a second form: a checker that fails correctly over a fraction of the corpus
+
+Every earlier instance in this corpus was a checker that **could not fail**.
+`sylpheed-port` found the other shape: `audit-kinds` **fails correctly** and was
+auditing **16 of 71** authored justifications, never saying so — while its clean
+runs were being quoted as evidence the authored data is grounded. That was a
+statement about a sixth of it.
+
+📌 Their formulation is the one to keep: ***"I checked and it was fine"* and *"I
+checked the part that declared itself"* read identically in a log.**
+
+✅ Measured the same thing here. `check_refuted.py` covers **83 of 86** refutation-
+shaped bullets — **97 %**, better than theirs and **equally unstated until now**.
+It prints its scope before its verdict.
+
+⚠️ **The remaining 3 are deliberate, and forcing them would be worse than the gap.**
+They quote their claim in backticks and are bare identifiers (`+0x29d0`,
+`position = instance − 0x12c`); registering those would match every live mention of
+the same offset. Both agents landed on the same rule independently: **report the
+ratio, do not demand it be 1** — a counter that must be satisfied invites
+mislabelling, which is a worse failure than an honest gap.