The two indicators can only move one way under twinning - <|L|> down from 0.500
toward 0.375, the second moment down from 2.0 toward 1.5 - but they were combined
with an OR, so a narrow intensity distribution could report a twin on its own while
the L-test said the opposite.
That is not a marginal disagreement. It fires on small-cell rotation data, where a
twin fraction of 0.50 was reported for a crystal whose <|L|> was 0.63: a value no
twin can produce, and one that points at the opposite situation - a structure whose
intensities behave centric. Suppress the flag when <|L|> sits at or above its
untwinned value; the two indicators are otherwise combined exactly as before.
Measured over 113 stored reports: two flip, both of them wrong today, and nothing
else moves.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EFEJG6WBQv8th4UJFNe53N