From bcb822d4b9e5b54012dfda3fc816148f37c33fd4 Mon Sep 17 00:00:00 2001 From: sylph-decoder Date: Sun, 30 Aug 2026 08:29:01 +0000 Subject: [PATCH] method: a rule learned from a burn generalises by resemblance, not by mechanism From the port agent. This file already carries two divisor bugs of the same shape -- a silent input in a divisor attenuating real signal -- and the lesson taken from them was 'be suspicious of dividing by N'. Applied to the intro's three streams it produced a unity sum that the port's own checker rejected at +2.62 dBFS. The precedent did not transfer because a BGM bank's two waves are stems of one signal while the intro's three streams are positions in a field, whose downmix weights sum to one whatever the assignment. Nothing in 'several streams, one output' distinguishes those. The general point: a rule extracted from a burn is indexed by what the burn looked like rather than by why it happened, so it fires on the next thing with the same silhouette while feeling well-earned. State the mechanism a past lesson turned on and check that mechanism is present. Co-Authored-By: Claude Opus 5 (1M context) Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v --- docs/re/METHOD.md | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/docs/re/METHOD.md b/docs/re/METHOD.md index dbfeeec1..e8453deb 100644 --- a/docs/re/METHOD.md +++ b/docs/re/METHOD.md @@ -1285,3 +1285,33 @@ across geometries. Nobody was looking for that. measurement (single-channel, plate-crop) *and* the published figure had a real flaw. "One of us must be right" was never the shape of it — which is worth remembering before spending a round arguing about which. + +## A rule learned from a burn generalises to cases that LOOK like the burn, not to cases that share its mechanism + +Contributed by the port agent, and it is the sharpest thing either of us has put in +this file. + +This file already carries **two** divisor bugs, both the same shape: a silent input +sitting in a divisor and attenuating real signal. The lesson taken from them was +roughly *"be suspicious of dividing by N"*. So when the intro's three streams had to +be combined, the port summed at **unity** — and its own checker rejected the tree at +**+2.62 dBFS**. + +🔴 **The precedent did not transfer, and the surface shape is why it looked like it +would.** Both cases are "several streams, one output". But: + +* a BGM bank's two waves are **stems of one signal** — parts that were split apart + and must be added back; +* the intro's three streams are **positions in a field** — a stereo downmix weights + them 0.4142 / 0.2929 / 0.2929, which **sum to one whatever the assignment**, so + the total is fixed even when the placement is unknown. + +Divide-by-N is neither right nor wrong in itself. It depends on whether the inputs +are parts of one *signal* or parts of one *field*, and nothing in the phrase +"several streams, one output" distinguishes those. + +⚠️ **The general failure**: a rule extracted from a specific burn tends to be indexed +by *what the burn looked like* rather than by *why it happened*. It then fires on the +next thing with the same silhouette — and, worse, feels well-earned while doing it. +When reaching for a past lesson, state the mechanism it turned on and check that +mechanism is present, not the resemblance.