Open-question validation: impossible_object_dataset_3000
Status: PASS
Source items: 3000
Included: 3000
Excluded: 0
Exclusions: {}
Sub-facts: crossing_count, constructible
Constant-answer baselines: {"constructible": 0.5, "crossing_count": 0.25}
Fields >=60%: {}
Independent derivation mismatches: 0
Deterministic sub-fact dependency violations: 0
PNG recovery: 3000/3000
Special checks: {}
Issues: []