The operator's chapter 6 review found a line attributed to Hallr that the text
gives to a scum boy, and no part of the system had flagged it. Spec 24 §2
diagnosed why: the duplicate scan only compares names that already exist, so it
cannot see a line given to the wrong EXISTING speaker. Spec 24 §4A proposed a
mechanical evidence gate. This is that gate, measured.
New umbraaudio/analysis/speech_evidence.py, model-free, plus
scripts/report_speech_evidence.py (read-only) and 44 tests.
For every dialogue line: extract the speaker the narration actually names, build
the candidate set from the cast rather than from the guess, and return
supported / contradicted / unsupported / unconstrained.
Last Dwarf, all 49 chapters, 3,918 dialogue lines:
supported 1,844 47.06%
unconstrained 2,032 51.86%
contradicted 34 0.87%
unsupported 8 0.20%
review queue 42 1.07%
It catches the chapter 6 defect exactly: "The leader on the right for Hallr
says," / "We want to be the ones to claim we killed the last dwarf" assigned to
Hallr, with the two leaders who could own it. attribution_qa reports 11 findings
book-wide and this one is not among them.
Two design decisions carried the precision, and both were forced by measurement.
First, "no tag" is not a finding: most dialogue has no tag because a tag
introduces only the first line of a conversation, so unconstrained and
unsupported are separate verdicts. The first working version queued 60% of the
book for this reason, which is the same as having no gate. Second, "ambiguous"
was removed as a verdict - it hid the case that matters, since a line assigned to
Hallr under "The leader on the right" is wrong no matter how many leaders exist.
Candidate count now decides whether a suggested fix is confident or a question.
Two corrections to spec 24, both from measurement. The 20 role-tag violations
reported in section 3 are really 11; my ad-hoc probe was worse than the checker
it was meant to replace. And identity coverage is already 100% - every dialogue
line resolves to a profile or alias - so the defect is never a missing speaker,
it is a line given to the wrong existing one.
Six extractor bugs the measurement exposed are now regression tests: a role
phrase with a spatial qualifier produced no tag at all; a coordinated predicate
spoke as its first subject instead of its last; a possessive voice resolved to a
profile called Voice; irregular plurals and superlatives never matched; and the
subject was read off trailing participial clauses. Two generalisable rules came
out of them - a speech tag's subject is a noun phrase and a prepositional
qualifier is still part of it, and a subordinating conjunction opens a clause of
its own ("The dragon swallows when Hallr says" is Hallr).
Reports carry chapter_id AND title because chapter_id and chapter_index differ
by one in every project here; a bare "ch8 utt264" sent the operator to the wrong
chapter, and the line they asked about is chapter 9 utt264.
Full suite 619 passed / 8 failed, the same 8 pre-existing failures. ruff clean.
