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Nine ADRs (0254, 0256-0263) were merged into main and left stamped Proposed. Two carried an explicit ratify-on-merge predicate their own merge had already discharged, and ADR-0256 governs deduction_serving_enabled, which was ratified True on 2026-07-24 and is serving live traffic. So the governance record asserted "not yet decided" about a decision already in force. That is the asymmetry the assessment arc (#113) found one file over in workbench/api.py: the honest path degrades, the stale record lies. An unwritten ADR is a visible gap; a Proposed one that is actually in force is a false statement. Each stamp records the ACTUAL ratifying act -- "Accepted, ratified by Joshua Shay via <merge> (<sha>, <date>)" -- derived from the commit that added the file and verified an ancestor of main, not assumed. Merge authority is Shay's alone (AGENTS.md: no merge automation), so the merge IS the ratifying act. No ADR content changed. No flag changed. ADR-0262's stamp says so explicitly: accepting it does NOT enable curriculum_serving_enabled, which stays False pending ratified volume -- eleven bands re-measured today, still 24x-73x short. tests/test_adr_status_governance.py pins two independent invariants in the smoke (pre-push) suite: 1. A default-ON flag is not governed by a Proposed ADR. The flag -> ADR mapping is DERIVED by walking core/config.py for `<name>: bool = True` and reading ADR refs from the preceding comment block -- not a hand-written table, which would be the same second-copy-of-a-closed-set defect ADR-0256's arc fixed. 2. A ratify-on-merge predicate cannot coexist with Proposed. Self-discharging: the file being on main IS the merge having happened. Plus a vacuity guard, because a derivation that parses zero flags would make every other assertion pass on an empty set. Registered two orphans found in passing: test_adr_index.py (5) and test_ratification_ceremony.py (14) landed in #113 in NO curated suite, so 19 tests -- including the one mechanism that can move curriculum volume -- ran only under `full`, which gates nothing. Fifth instance of this shape. Deliberately NOT fixed, recorded in the research doc: the 312-file corpus has 27 unparseable status lines and draft/ratified/active variants. A closed-vocab assertion would fail on ~35 pre-existing files and get muted, and a muted gate reads as coverage. [Verification]: smoke 555 passed in 137.73s (236 baseline + 314 + 5, +1.2s); governance pin 314 passed in 1.18s standalone and MUTATION-CHECKED -- reverting ADR-0256 to Proposed fails both invariants independently (2 failed/312 passed); orphans 19 passed; ruff clean. Canonical Python 3.12.13, uv sync --locked.
131 lines
7.2 KiB
Markdown
131 lines
7.2 KiB
Markdown
# ADR-0260 — Band v5-VP: verb-predicate arguments, decided
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- **Status:** Accepted — ratified by Joshua Shay via the PR #111 merge (`2a82c8a3`, 2026-07-24)
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- **Date:** 2026-07-24
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- **Arc:** deduction-serve (ADR-0256 → 0257 → 0258 → 0259 → this)
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- **Governs:** `generate/proof_chain/verb.py`, the `en_verb_*` shape-bands,
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their arena templates, the `v2_verb` lane split, and the
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`_verb_band_surface` serving tier.
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## 1. Context
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ADR-0258 §6.3 scoped verb predicates out of the member band: v3-MEM reads
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only copula sentences, so "All philosophers teach. Socrates is a
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philosopher. Therefore Socrates teaches." refused — despite being the plain
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English shape in which most non-logic subject matter states its rules
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(physics, biology, and every other domain speak in verb sentences, not is-a
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chains). The generalization arc (docs/plans/generalization-arc-2026-07-24.md
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Phase 1.1) makes this the single highest-leverage reading unlock: Phase 2's
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curriculum-entailment serving is gated on it.
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The earlier bands each guard this territory out rather than misreading it:
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v2-EN refuses quantifier-led sentences (`categorical_shape_out_of_band`),
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is-a clauses (`membership_shape_out_of_band`), and unnormalized negation
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(`internal_negation_unread`); v3-MEM/v4-CM refuse copula-free sentences
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(`sentence_shape_out_of_band`). Pure verb-fact restatements with none of
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those triggers are ALREADY decided soundly by v2-EN as opaque clause-atoms —
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so this band's genuine territory is exactly the fall-through: arguments
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mixing verb sentences with quantified rules, membership facts, or `does not`
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negation.
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## 2. Decision
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Add `generate.proof_chain.verb.read_verb_argument` as the next fallback tier
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(after v1 / v1b / v2-EN / v3-MEM / v4-CM), extending v3-MEM's
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per-individual propositional lowering with a SECOND atom family in one
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shared space:
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- **Membership atoms** *(individual, class-group)* — minted by v3-MEM's own
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`_parse_singular` / `_parse_universal`, reused verbatim (copula sentences
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keep their exact v3-MEM reading, refusals included).
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- **Verb atoms** *(individual, verb-lemma-group, object-term)* — minted from
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verb facts (`<name> <verb3sg> [<object>]`, `does not` negation, the
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sentential-not prefix) and verb universals
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(`all|every|each|no [the] <class> <verb> [<object>]`).
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A verb universal instantiates at every named individual as
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`mem(i, C) -> [~]verb(i)` — so a membership fact minted by a copula sentence
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discharges a verb rule. The same verified ROBDD engine decides.
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Bands (priority order): `en_verb_negative` (any negative universal, either
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kind) > `en_verb_chain` (≥2 universals) > `en_verb_universal` (exactly 1) >
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`en_verb_fact` (facts only). Rendered by `render_entailment_verb` — the
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member surface with the UNKNOWN scoping extended to the verb reading. Rides
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`deduction_serving_enabled` (default off); no new flag.
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## 3. Why this is sound
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1. **Instantiation** — identical to ADR-0258 §3: universal instantiation at
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named individuals is truth-preserving in every first-order model, and
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each *(verb-group, object-term)* pair is one opaque unary predicate over
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the same named-individual domain. ENTAILED / REFUTED / inconsistent
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verdicts over the lowered premises hold in every model of the original
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argument; completeness within the fragment lifts the same way (a
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propositional countermodel's domain is exactly the named individuals).
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2. **Agreement is the ONE new identification** — a universal's base form
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("teach") and a singular fact's 3sg form ("teaches") are identified iff
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related by a CLOSED relation: a verb-specific irregular table (has/have,
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goes/go, does/do; consulted first, sole authority for its tokens) else
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the three regular suffix rules (+s, +es after sibilants, y↔ies). The noun
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table is deliberately NOT reused — it would misroute verb forms like
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"lives" (noun: life; verb: live). Under-linking costs coverage, never
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soundness. Object terms link by exact token identity only.
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3. **Scope-tight segmentation** — without a lexicon, an arbitrary
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copula-free token run cannot be soundly split into subject/verb/object;
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the band reads single-token name/class/verb/object shapes ONLY, and
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refuses everything longer, typed. A three-token sentence read as
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(subject, verb, object) is a disclosed reading, restated verbatim in the
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surface's "Given:" line.
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4. **Cascade honesty** — every text this band decides was verified to be
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REFUSED by all four earlier bands (the arena templates and lane cases
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are constructed on the fall-through path serving actually uses), so this
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tier is pure widening: every previously-served argument is served
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byte-identically.
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## 4. License and render
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The four `en_verb_*` bands earned SERVE through the ADR-0199 arena
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(720/band committed, wrong=0, θ_SERVE=0.99; ledger resealed at 21 bands).
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The arena's by-construction gold is cross-checked template-by-template
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against the independent truth-table oracle over each template's INTENDED
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per-individual lowering, with no reader in the loop (INV-25). Unearned or
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ledger-stripped deployments serve the same sound answer hedged
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(`_UNVERIFIED_SHAPE_DISCLOSURE`), exactly as every earlier band.
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## 5. Scope-outs (typed refusals today, future bands' territory)
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1. **Connective × verb composition** — "If Socrates teaches then …"
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refuses `mixed_structure_out_of_band`; fusing v4-CM's connective grammar
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over verb leaves is the natural next composition.
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2. **Multi-token subjects/objects, PPs, adverbs, ditransitives** —
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`sentence_shape_out_of_band`. Note one disclosed misreading inside the
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3-token shape: an adverb in object position ("Lena runs quickly") is
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read as an object TERM — never unsound (worst case an over-scoped
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UNKNOWN), documented here rather than guessed at.
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3. **Tense** — `did not` refuses `tense_out_of_band`; bare past forms
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("taught") are indistinguishable from lemmas without a lexicon and read
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as distinct opaque lemmas (under-linking, sound).
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4. **Arity/subsumption** — "teaches" does not entail "teaches logic" (nor
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vice versa) under the face-value reading; both directions stay UNKNOWN,
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scoped. Same posture v2-EN already takes for opaque clauses.
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5. **Plural/bare subjects in verb facts** ("dogs bark") — read as an
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individual named "dogs" (disclosed in the UNKNOWN scoping); the copula
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analogue is refused by v3-MEM's bare-plural guard, but no copula means no
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plural signal in the closed grammar.
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6. Existential (`some`) witnesses, identity/co-reference — unchanged
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scope-outs inherited from ADR-0258 §6 (existentials are the
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generalization arc's Phase 1.2, assigned to the Opus tier).
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## 6. Verification
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- `tests/test_verb_argument_reader.py` — 34 tests: gap-is-real cross-check,
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flagship lowering, every agreement rule, object-in-atom-key, chain
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discharge, cross-individual non-leakage, family separation
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(teacher/teaches), 14 typed refusals incl. delegated v3-MEM reasons,
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honesty caps, determinism.
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- Surface/e2e/lane: `tests/test_deduction_surface.py` (+5),
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`tests/test_deduction_serve_e2e.py` (+1),
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`tests/test_deduction_serve_lane.py` (+1 over the 28-case `v2_verb`
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split) — full lane 134/134, wrong=0, all five splits.
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- Arena: 4 × 720 committed, wrong=0, first seal run; corpus soundness
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asserted against the independent oracle before sealing (15,120 cases).
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