The propositional slice of ADR-0243's falsifiability benchmark (plan §5 Phase 4),
the arc's load-bearing evidence. Two mechanism-disjoint engines decide the SAME
enumerated propositional problems:
- Field decoder: propositional_entails (Cl(4,1) wave-field ground energy).
- Gold: generate.proof_chain.entail.evaluate_entailment (exact ROBDD tautology
check, ADR-0201 keystone) — genuinely independent, not the field checking itself.
A clause→string bridge (render_clause: `a | ~b | c`) lets both engines decide
byte-for-byte the same problem. Result over the enumerated panel (atoms a,b,c;
premise sets size ≤2):
- 1008 satisfiable-premise ID comparisons: field.entailed ⇔ gold is ENTAILED —
wrong == 0.
- 18 inconsistent-premise cases: field discloses satisfiable_premises=False
exactly where gold returns REFUSED — matched refusal, no ex-falso leak.
- OOD (>5 atoms): field decoder refuses by construction while gold still decides
— the honest ID/OOD scope boundary in the propositional domain.
Deterministic (enumerated, no randomness/wall-clock); off-serving (evals/ only,
chat/runtime non-import pinned).
[Verification]: tests/test_adr_0243_propositional_falsifier.py — 6 passed;
run_propositional_falsifier() → wrong=0 over 1026 field-vs-gold decisions.
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