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method: a rule learned from a burn generalises by resemblance, not by mechanism

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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) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
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2026-08-30 08:29:01 +00:00
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@@ -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.