{"query": "4 bonds, 0 lone pairs → tetrahedral, 109.47°", "count": 7, "results": [{"id": "card_v_caf54eaa69fb", "title": "4 bonds, 0 lone pairs → tetrahedral, 109.47°", "shelf": "molecular_geometry", "surface": "secular", "snippet": "Verdict: HOLDS.\n• molecular_geometry.vsepr: steric 4 (4 bonding + 0 lone) -> tetrahedral, bond angle 109.47 deg\nSealed and independently re-checkable: https://narrowhighway.com/s/2383f5502d5cbaf290c97", "authority_tier": "engine", "source": "Verified by the engine — molecular_geometry", "generated": false}, {"id": "card_theory_vsepr_theory", "title": "VSEPR theory (molecular geometry)", "shelf": "theories", "surface": "secular", "snippet": "VSEPR theory (molecular geometry) — an engine domain that can touch it: molecular_geometry. Calibration: seals — shapes and bond angles predict directly. Valence Shell Electron Pair Repulsion: electro", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_domchk_molecular_geometry_claimed_geometry", "title": "Molecular Geometry: geometry", "shelf": "molecular_geometry", "surface": "secular", "snippet": "A worked check in molecular geometry: geometry.\n\nGIVEN\n  bonding_domains = 4\n  lone_pairs = 0\n\nCLAIMED\n  claimed_geometry = tetrahedral\n\nTHE ENGINE'S VERDICT\n  molecular_geometry.vsepr: CONFIRMED — st", "authority_tier": "reference", "source": "The verifier's own documented relation, and a run this engine performed against it (deterministic; re-runnable with tools/domain_goldens.py)", "generated": false}, {"id": "card_domchk_molecular_geometry_claimed_bond_angle_deg", "title": "Molecular Geometry: bond angle deg", "shelf": "molecular_geometry", "surface": "secular", "snippet": "A worked check in molecular geometry: bond angle deg.\n\nGIVEN\n  bonding_domains = 4\n  lone_pairs = 0\n\nCLAIMED\n  claimed_bond_angle_deg = 109.47\n\nTHE ENGINE'S VERDICT\n  molecular_geometry.vsepr: CONFIRM", "authority_tier": "reference", "source": "The verifier's own documented relation, and a run this engine performed against it (deterministic; re-runnable with tools/domain_goldens.py)", "generated": false}, {"id": "card_works_vsepr", "title": "Why methane is a tetrahedron", "shelf": "the-works", "surface": "secular", "snippet": "Four bonding pairs and no lone pairs around a central atom push apart into a tetrahedron with 109.47° angles — the shape of methane, and of carbon's whole architecture.  Worked & sealed by the engine ", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}, {"id": "card_src_pron_tetrahedral", "title": "tetrahedral", "shelf": "pronunciation", "surface": "secular", "snippet": "tetrahedral: pronounced (ARPABET) T EH2 T R AH0 HH IY1 D R AH0 L. From the CMU Pronouncing Dictionary — the standard machine-readable pronunciations of North American English.", "authority_tier": "reference", "source": "CMU Pronouncing Dictionary (cmudict) — BSD-2-Clause, Carnegie Mellon", "generated": false}, {"id": "card_alm_connection_shape_and_number_are_one", "title": "Almanac: Shape and number are one -- coordinates turn every figure into arithmetic and back, with the right triangle as the master key", "shelf": "almanac", "surface": "secular", "snippet": "SITUATION\n  Capstone of the geometry cluster. Lay a grid on space and shape becomes number: a point is its coordinates, a length is a calculation, an angle is a ratio -- and the sealed cards of this c", "authority_tier": "reference", "source": "The Almanac — verified-only practical wisdom (sealed)", "generated": false}]}