core/tests/test_deduction_surface.py
Shay ab6da7765e feat(deduction-serve): Band v4-CM — conditional-membership fusion, decided (ADR-0259)
Composes v2-EN's connective grammar (if/then, or, and, either) with
v3-MEM's singular-membership sentence reading over one shared
per-individual atom space, so "If Socrates is a man then Socrates is
mortal. Socrates is a man. Therefore Socrates is mortal." decides — the
exact gap ADR-0258 §6.1 reserved. Genuinely fuses the two mechanisms: a
bare universal's instantiated atom can unify (via the same closed
morphology relation) with a connective leaf's atom, deciding arguments
neither band alone could.

- generate/proof_chain/cond_member.py: new reader. A sentence is checked
  for a connective token BEFORE the universal-lead check (so a stray
  connective can never leak into an opaque name/class run); reuses v3-MEM's
  own _parse_singular/_parse_universal verbatim (already negation-aware,
  so no separate negation layer is needed, unlike v2-EN's opaque minter).
  Four new shape-bands (fused/disjunctive/chain/conditional), each earning
  its own SERVE license.
- chat/deduction_surface.py: new fallback tier tried strictly after v3-MEM
  — pure widening, every previously-served argument stays byte-identical.
- evals/deduction_serve/practice/gold.py: 4 new synthetic template groups
  (20 templates), reusing the v3-MEM case generator; intended formulas
  cross-checked against the independent oracle (INV-25).
- evals/deduction_serve/v2_condmem/: 26 hand-authored real-English cases,
  content-disjoint from the synthetic corpus.
- ds-mem-0024 promoted declined -> unknown (not entailed — the antecedent
  is never asserted in that text; this is the first promotion in the
  corpus that doesn't land on entailed).
- Ledger re-sealed to 17 bands; deduction_serve_v1 lane SHA re-pinned
  (surgical single-line edit, not a blanket --update).

Verification: core test --suite deductive 160 passed (31 new reader
tests); practice arena 17 bands x 720 wrong=0, all SERVE-licensed; lane
splits v1 28/28, v2_en 26/26, v2_member 26/26, v2_condmem 26/26; smoke 180
passed; warmed_session 10 passed. Flag deduction_serving_enabled stays
default-off.
2026-07-24 10:14:00 -07:00

373 lines
15 KiB
Python

"""Deduction-serve arc, Phase 1 — DEDUCTION composer tests.
The contract these tests pin:
- ``deduction_serving_enabled`` is OFF by default; flag-off ``chat()``
output is byte-identical to pre-arc behavior for argument-shaped text
(the pack-token-gloss fallback, unchanged).
- Flag-on: a sentence-initial "therefore" conclusion clause commits the
turn to ``chat/deduction_surface.py``; every committed turn returns a
surface (never a silent fall-through to a different composer).
- The full propositional comprehension gold corpus (Band v1) decides
correctly end-to-end through the real ``ChatRuntime.chat()`` path,
across multiple turns in one session (wrong=0).
- Out-of-band shapes (categorical/syllogism, multi-word English
propositions) are honestly declined, not silently misrouted.
- Non-argument-shaped text is untouched regardless of the flag.
"""
from __future__ import annotations
from chat.deduction_surface import (
_UNVERIFIED_SHAPE_DISCLOSURE,
deduction_grounded_surface,
looks_like_deductive_argument,
)
from chat.runtime import ChatRuntime
from core.config import RuntimeConfig
from evals.propositional_logic.runner import _load_cases
# ---------------------------------------------------------------------------
# Pure-function contract — looks_like_deductive_argument
# ---------------------------------------------------------------------------
def test_looks_like_deductive_argument_true_for_therefore_conclusion() -> None:
assert looks_like_deductive_argument("If p then q. p. Therefore q.")
assert looks_like_deductive_argument("p or q. Not p. Therefore q.")
assert looks_like_deductive_argument(
"All mammals are animals. All whales are mammals. "
"Therefore all whales are animals."
)
def test_looks_like_deductive_argument_requires_sentence_initial_therefore() -> None:
""""therefore" mid-clause (not its own conclusion clause) does not commit
the turn — matches the reader's own per-clause discipline."""
assert not looks_like_deductive_argument("What is light therefore darkness")
assert not looks_like_deductive_argument("What is light?")
assert not looks_like_deductive_argument("")
# ---------------------------------------------------------------------------
# Pure-function contract — deduction_grounded_surface
# ---------------------------------------------------------------------------
def test_non_argument_text_returns_none() -> None:
assert deduction_grounded_surface("What is light?") is None
assert deduction_grounded_surface("Why does parent exist?") is None
def test_entailed_case_renders_entailment() -> None:
surface = deduction_grounded_surface("If p then q. p. Therefore q.")
assert surface is not None
assert "entail: q" in surface
def test_refuted_case_renders_refutation() -> None:
surface = deduction_grounded_surface(
"If p then q. Not q. Therefore not p."
)
assert surface is not None
assert "entail" in surface
def test_unknown_case_renders_honest_indeterminacy() -> None:
surface = deduction_grounded_surface("p or q. Therefore p.")
assert surface is not None
assert "don't settle" in surface
def test_inconsistent_premises_renders_typed_decline() -> None:
surface = deduction_grounded_surface("p. Not p. Therefore q.")
assert surface is not None
assert "inconsistent" in surface
def test_categorical_argument_is_decided_band_v1b() -> None:
"""A valid categorical syllogism is now DECIDED (Band v1b, Phase 4) — the
production categorical decider serves a validity verdict, no longer a
decline."""
surface = deduction_grounded_surface(
"All mammals are animals. All whales are mammals. "
"Therefore all whales are animals."
)
assert surface is not None
assert "valid" in surface
assert "follows" in surface
def test_invalid_categorical_argument_is_rejected() -> None:
"""An invalid syllogism (undistributed middle) is decided INVALID, not
declined and not falsely served as valid (wrong=0 on the categorical band)."""
surface = deduction_grounded_surface(
"All cats are animals. All dogs are animals. Therefore all dogs are cats."
)
assert surface is not None
assert "doesn't follow" in surface
def test_multiword_conditional_is_decided_band_v2_en() -> None:
"""Natural-English multi-word propositions — Band v1's documented boundary
case (this exact text used to surface ``reserved_word_in_np``) — are now
DECIDED by the English-clause band (ADR-0257), authoritatively (the
``en_conditional_single`` band holds an earned SERVE license), with the
verdict rendered over the user's own clauses."""
surface = deduction_grounded_surface(
"If it rains then the ground is wet. It rains. "
"Therefore the ground is wet."
)
assert surface is not None
assert "Your premises entail: the ground is wet" in surface
assert not surface.startswith(_UNVERIFIED_SHAPE_DISCLOSURE)
def test_contraposition_is_decided_band_v2_en() -> None:
"""The other documented Band v1 boundary case (nested negation in a
conditional conclusion) — now decided: contraposition is ENTAILED."""
surface = deduction_grounded_surface("If p then q. Therefore if not q then not p.")
assert surface is not None
assert "Your premises entail: if not q then not p" in surface
def test_english_modus_tollens_via_copular_negation() -> None:
surface = deduction_grounded_surface(
"If the alarm is armed then the light is on. The light is not on. "
"Therefore the alarm is not armed."
)
assert surface is not None
assert "Your premises entail: the alarm is not armed" in surface
def test_english_unknown_is_scoped_to_the_opaque_reading() -> None:
"""UNKNOWN is the one verdict that is NOT substitution-closed (internal
clause structure this band did not read could settle it), so its surface
must scope the claim to the opaque reading explicitly (ADR-0257 §3)."""
surface = deduction_grounded_surface(
"If it rains then the ground is wet. The ground is wet. Therefore it rains."
)
assert surface is not None
assert "Reading each clause as one indivisible claim" in surface
assert "don't settle" in surface
def test_english_unearned_band_would_be_hedged() -> None:
"""The en_* bands ride the SAME earned-license gate: strip the license and
the same sound answer is served DISCLOSED, never authoritatively."""
surface = deduction_grounded_surface(
"If it rains then the ground is wet. It rains. Therefore the ground is wet.",
license_lookup=lambda band: None,
)
assert surface is not None
assert surface.startswith(_UNVERIFIED_SHAPE_DISCLOSURE)
assert "Your premises entail: the ground is wet" in surface
def test_english_reader_refusal_keeps_prior_honest_surface() -> None:
"""When the English band ALSO cannot read the argument, the pre-existing
honest surfaces are preserved verbatim — the band only widens."""
surface = deduction_grounded_surface("It never snows. Therefore it never snows.")
assert surface is not None
assert "can't parse" in surface
def test_membership_syllogism_is_decided_band_v3_mem() -> None:
"""The classic instantiation syllogism — reserved by ADR-0257 §6.1, now
DECIDED by the member band (ADR-0258), authoritatively (the
``en_member_single`` band holds an earned SERVE license), with the verdict
rendered over the user's own sentences."""
surface = deduction_grounded_surface(
"Socrates is a man. All men are mortal. Therefore Socrates is mortal."
)
assert surface is not None
assert "Your premises entail: socrates is mortal" in surface
assert not surface.startswith(_UNVERIFIED_SHAPE_DISCLOSURE)
def test_member_negative_universal_is_decided() -> None:
"""The E-form ("no …") lowers to a negated instantiation and decides."""
surface = deduction_grounded_surface(
"Fido is a dog. No dogs are cats. Therefore Fido is not a cat."
)
assert surface is not None
assert "Your premises entail: fido is not a cat" in surface
def test_member_unknown_is_scoped_to_the_instantiated_reading() -> None:
"""Member-band UNKNOWN must scope itself (ADR-0258 §3): co-reference of
distinct names or an unlinked class identity could settle what the
lowering leaves open, so the claim is stated of the reading."""
surface = deduction_grounded_surface(
"Socrates is mortal. All men are mortal. Therefore Socrates is a man."
)
assert surface is not None
assert "Reading each name as one individual" in surface
assert "don't settle" in surface
def test_member_unearned_band_would_be_hedged() -> None:
"""The en_member_* bands ride the SAME earned-license gate: strip the
license and the same sound answer is served DISCLOSED, never
authoritatively."""
surface = deduction_grounded_surface(
"Socrates is a man. All men are mortal. Therefore Socrates is mortal.",
license_lookup=lambda band: None,
)
assert surface is not None
assert surface.startswith(_UNVERIFIED_SHAPE_DISCLOSURE)
assert "Your premises entail: socrates is mortal" in surface
def test_member_reader_refusal_keeps_prior_honest_surface() -> None:
"""When the member band ALSO cannot read the argument (here: tense, a
deliberate ADR-0258 scope-out), the pre-existing honest surfaces are
preserved verbatim — the band only widens."""
surface = deduction_grounded_surface(
"Socrates was a man. All men are mortal. Therefore Socrates is mortal."
)
assert surface is not None
assert "can't parse" in surface
def test_conditional_membership_fusion_is_decided_band_v4_cm() -> None:
"""The ADR-0258 §6.1 scope-out, now decided (ADR-0259): a conditional
whose clauses are membership facts, authoritatively (the
``en_condmem_conditional`` band holds an earned SERVE license)."""
surface = deduction_grounded_surface(
"If Socrates is a man then Socrates is mortal. Socrates is a man. "
"Therefore Socrates is mortal."
)
assert surface is not None
assert "Your premises entail: socrates is mortal" in surface
assert not surface.startswith(_UNVERIFIED_SHAPE_DISCLOSURE)
def test_conditional_membership_fusion_genuinely_fuses() -> None:
"""The mechanism this band adds: a bare universal's instantiated atom
unifies with a connective leaf's atom — neither mechanism alone decides
this argument."""
surface = deduction_grounded_surface(
"All men are mortal. If Socrates is a philosopher then Socrates is a man. "
"Socrates is a philosopher. Therefore Socrates is mortal."
)
assert surface is not None
assert "Your premises entail: socrates is mortal" in surface
def test_cond_member_unknown_is_scoped_to_the_instantiated_reading() -> None:
surface = deduction_grounded_surface(
"If Socrates is a man then Socrates is mortal. Therefore Socrates is mortal."
)
assert surface is not None
assert "Reading each name as one individual" in surface
assert "don't settle" in surface
def test_cond_member_unearned_band_would_be_hedged() -> None:
"""The en_condmem_* bands ride the SAME earned-license gate: strip the
license and the same sound answer is served DISCLOSED, never
authoritatively."""
surface = deduction_grounded_surface(
"If Socrates is a man then Socrates is mortal. Socrates is a man. "
"Therefore Socrates is mortal.",
license_lookup=lambda band: None,
)
assert surface is not None
assert surface.startswith(_UNVERIFIED_SHAPE_DISCLOSURE)
assert "Your premises entail: socrates is mortal" in surface
def test_cond_member_reader_refusal_keeps_prior_honest_surface() -> None:
"""When the conditional-membership band ALSO cannot read the argument
(here: a conditional nested inside another), the pre-existing honest
surface is preserved verbatim — the band only widens."""
surface = deduction_grounded_surface(
"If the door is open then if the window is open then the room is cold. "
"Therefore the room is cold."
)
assert surface is not None
assert "can't parse" in surface
def test_surface_is_deterministic() -> None:
text = "If p then q. p. Therefore q."
assert deduction_grounded_surface(text) == deduction_grounded_surface(text)
# ---------------------------------------------------------------------------
# Live runtime — flag off is byte-identical to pre-arc dispatch
# ---------------------------------------------------------------------------
def test_flag_off_preserves_pack_token_gloss_byte_identity() -> None:
rt = ChatRuntime(
config=RuntimeConfig(deduction_serving_enabled=False), no_load_state=True,
)
resp = rt.chat("If p then q. p. Therefore q.")
assert resp.grounding_source == "pack"
assert "Pack-resident tokens" in resp.surface
def test_flag_is_off_by_default() -> None:
assert RuntimeConfig().deduction_serving_enabled is False
# ---------------------------------------------------------------------------
# Live runtime — flag on, single turn
# ---------------------------------------------------------------------------
def test_runtime_deduction_serves_entailed_answer() -> None:
rt = ChatRuntime(
config=RuntimeConfig(deduction_serving_enabled=True), no_load_state=True,
)
resp = rt.chat("If p then q. p. Therefore q.")
assert resp.grounding_source == "deduction"
assert "entail: q" in resp.surface
def test_runtime_non_argument_prompt_unaffected_by_flag() -> None:
"""The flag only intercepts argument-shaped text; ordinary prompts
still route through the pre-existing dispatch."""
rt = ChatRuntime(
config=RuntimeConfig(deduction_serving_enabled=True), no_load_state=True,
)
resp = rt.chat("What is light?")
assert resp.grounding_source != "deduction"
# ---------------------------------------------------------------------------
# Live runtime — full propositional gold corpus, multi-turn session, wrong=0
# ---------------------------------------------------------------------------
def test_runtime_decides_full_propositional_gold_corpus_wrong_zero() -> None:
"""End-to-end regression: every Band v1 gold case, decided through the
real ``core chat`` serving path across one multi-turn session (not
just the isolated comprehend->project->oracle lane). wrong=0 is the
load-bearing assertion; declines are acceptable, a disagreement with
gold is not."""
rt = ChatRuntime(
config=RuntimeConfig(deduction_serving_enabled=True), no_load_state=True,
)
cases = _load_cases()
assert cases, "gold corpus must not be empty"
wrong: list[str] = []
for case in cases:
resp = rt.chat(case["text"])
assert resp.grounding_source == "deduction", (
f"expected deduction routing for {case['text']!r}, "
f"got grounding_source={resp.grounding_source!r}"
)
surface = resp.surface
gold = case["gold"]
if gold == "entailed" and "Your premises entail:" in surface:
continue
if gold == "refuted" and "entail the opposite" in surface:
continue
if gold == "unknown" and "don't settle" in surface:
continue
wrong.append(f"{case['text']!r} -> gold={gold} surface={surface!r}")
assert not wrong, "\n".join(wrong)