Phase 3b (compound-clause held hypotheses) is prerequisite for Phase
4 (in-loop contemplate) to have anything to operate on. Combined
scope rather than separate briefs because:
- Phase 3b alone: 0 lift on train_sample (multi-actor defense
refuses, solver gaps prevent admission)
- Phase 3b + Phase 4: 2-4 case lift via gendered-pronoun resolution
- Phase 3b + 4 + solver multi-qty (separate ADR): 6-8 case lift
First concrete Phase 4 use case: gendered pronoun resolution via a
new en_core_names_v1 pack. Turns the multi-actor defense from
refuse-on-ambiguity into admit-via-evidence when an unambiguous
gendered name exists for one antecedent.
Architecture overview, Phase 3b extractor design, Phase 4
contemplate adapters (vault > packs > audit_history), wrong=0
hazard surfaces, sequencing (3b then 4 stacked), truth tests, and
deliberately-excluded scope (solver work, verb expansion, per-token
apply_word integration — all separate ADRs).
HYPOTHESIS_CAP raise from 4 to 8 needed for Phase 3b (case 0040
has 5 anchors). Documented in scope.
References: ADR-0174 (held-hypothesis comprehension), CLAUDE.md
§Lookback Review Discipline, memories for multi-actor pronoun
hazard and case-0050.
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