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re: GP_DIALOG 0/1 is a byte-identical duplicate; 2/3 is a structural pair

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The two adjacent pairs with identical element sets split. 0/1 are the same 59 810
bytes stored twice -- a duplicate, not a language pair. 2/3, the DIFFICULTY build,
differ in size and in 2.77 % of bytes from offset 0x1BB while sharing every element
name, which is what a language pair looks like.

Control: entries 10/11, known to be two different dialogs, differ in 54.90 % of the
common prefix, so the comparator separates unrelated dialogs.

Supported, not proven, with the untested step named: I have not captured DIFFICULTY
in ja. That the two are ENGLISH and JAPANESE rests on the disc's convention, not on
a capture of this screen. This partially restores a claim I withdrew, at lower
strength than the original phrasing.

Also records a refutation attempt on the port's BGM_103 exclusion: it survives and
is tighter than they stated -- of 32 census rows, exactly one bank carries EITHER
wave size, not merely both.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
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sylph-decoder
2026-08-31 03:12:59 +00:00
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@@ -837,3 +837,23 @@ screen. Checked against the disc, with the main menu as a control
**The claim survives**, and the control confirms the ordering rule reproduces a
screen whose answer is independently known.
### Refutation attempt on `sylpheed-port`'s `BGM_103` exclusion — ✅ SURVIVES, and is stronger (2026-08-31)
**Target:** their `audio.json` rests P6's most important value on three legs, two
of which they found to be a single disc-to-runtime comparison. The legs stand only
if the disc census **excludes alternatives** — they measured *"of 32 readable
`BGM_*` banks, exactly one carries waves of that size"*.
**My attempt:** re-derive the exclusion from the committed census
(`data/bgm-wave-census.txt`, produced by my own tool rather than their reader).
| | |
|---|---|
| census rows | 32 |
| banks carrying **both** 3 876 864 and 3 930 112 | **1** — `BGM_103.slb` |
| banks carrying **either** size | **1** — `BGM_103.slb` |
**The claim survives and the exclusion is tighter than they stated**: no other bank
carries *either* wave size, not merely not both. Their third leg is genuinely
discriminating.