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re: pre-register F6's numbers for an out-of-sample boot

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Every F5/F6 figure comes from captures taken for other purposes and
re-analysed after the reader and three labels were corrected. None has been
tested out of sample. Six predictions registered before the capture, five of
them checkable by check_labels.py, which now takes --cap NAME=path.

Prediction 6 is the one already got wrong once (0.057 against ptcopyright
instead of 0.14 against the real plate), and is stated so a landing near
0.057 would show the correction itself was wrong.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
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# Pre-registration — F6's numbers on a boot that did not produce them
Committed **before** the capture is taken. Every F5/F6 figure I hold comes from
`f6`, `f6b`, `f5` or `f5-early` — captures taken for other purposes, several
re-analysed after I fixed the draw reader and corrected three element labels.
**None has been tested out of sample.** A number re-derived from the same log
that suggested it is not independent evidence.
One fresh no-input boot. Five predictions, all phase-free, all failing loudly if
wrong:
| # | quantity | predicted |
|---|---|---|
| 1 | `pteff03a` period / `pteff03` period | **1.200** ±5 % |
| 2 | strip length ratio (`sy` 800/600) | **1.333** ±6 % |
| 3 | pulse period / sweep loop | **0.100** ±5 % |
| 4 | pulse amplitude vs `ptbtn00f.rat`'s declared 8-key curve | **≤3 alpha levels** mean error |
| 5 | `ptcopyright` ramp / parent ramp | **0.733** ±8 % |
And one that is not in the checker, stated here so it cannot be quietly dropped:
| 6 | sweep enters **before** `ptbtn00f`, by | **0.138–0.141** of a sweep loop |
⚠️ Prediction 6 is the one I got wrong once already — I measured it against
`ptcopyright` and published 0.057. If the fresh run lands near 0.057 rather than
0.14, the correction was wrong and the original figure was right.
**A pass is the boring outcome.** The value is that five of the six are checks a
wrong reader or a wrong label would fail, and the reader and two of the labels
have been wrong inside the last day.