gbanyan 2a13f0d985 Paper A v13 rev9.1: HC-meaning + same-pair table + interview/framing rebalance, plus typesetting polish ...

Respond to a second hostile GPT-5.5 reviewer pass on rev9. Four substantive
changes plus accumulated typesetting polish.

Reviewer points addressed:
- HC != reuse (Fatal 1): new Sec III-F "What HC Means and Does Not Mean" states
  plainly that HC denotes an extreme within-accountant repetition pattern that is
  rare between unrelated accountants, not a reuse label; reuse is one
  interpretation, carried at Firm A by byte-identity + context, never implied by
  HC alone; no reuse claim is made for Firms B/C/D.
- Any-pair construction (Fatal 2): new Table VI gives the per-signature HC flag
  rate by firm under the deployed any-pair rule vs the strict same-pair rule
  (cosine and dHash from the same partner). Same-pair lowers all rates but widens
  the firm gap: Firm A 57.3% vs baseline 5-9%, ratio 2.4-3.4x -> 6.4-10.8x, so
  the HC region is not an artefact of combining extrema from different pairs.
  Reproducible via samepair_hc.py (Hamming on stored dHash vectors).
- Interviews (Fatal 3): Sec III-A now states the interviews are used only to
  contextualize, are corroborative not confirmatory and not independently
  reproducible; their one load-bearing use (Firm A as known-positive benchmark)
  lowers rather than raises the claim. Empirical claims rest on calibration +
  byte-identity, which stand without them.
- Framing (Fatal 4, rebalance not relabel): contribution 3 elevated to the
  methodological core (label-free construction/characterization of an operating
  point without labels), explicitly demonstrated/stress-tested on audit
  signatures "rather than a finished, fully general framework." The audit finding
  is kept as a headline result, not demoted to a mere case study, and no
  general-framework claim is made.

Typesetting polish (verified by rendering pages to images):
- Unify scientific notation in Table II ([4x10^-6, 2.3x10^-5]).
- Tighten Table II row labels to cut excessive wrapping (3 lines -> 2).
- Fix duplicated figure captions (empty image alt-text so pandoc no longer
  auto-captions on top of the hand-written caption); unify caption punctuation.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qn59FdF9JMyfFg3sjcUNNG

2026-06-23 15:37:13 +08:00

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