{"query": "haversine(0,0 → 0,1°) ≈ 111.19 km", "count": 4, "results": [{"id": "card_v_e9a9cfd0bf9a", "title": "haversine(0,0 → 0,1°) ≈ 111.19 km", "shelf": "geography", "surface": "secular", "snippet": "Verdict: HOLDS.\n• geography.haversine_distance: haversine(0.0,0.0 → 0.0,1.0) = 111.19 km (matches claim 111.19492664455873)\nSealed and independently re-checkable: https://narrowhighway.com/s/130e2eba7", "authority_tier": "engine", "source": "Verified by the engine — geography", "generated": false}, {"id": "card_v_b40dade5fd6b", "title": "haversine(NYC → London) ≈ 5,570 km", "shelf": "geography", "surface": "secular", "snippet": "Verdict: HOLDS.\n• geography.haversine_distance: haversine(40.7128,-74.006 → 51.5074,-0.1278) = 5570.22 km (matches claim 5570.222179737958)\nSealed and independently re-checkable: https://narrowhighway", "authority_tier": "engine", "source": "Verified by the engine — geography", "generated": false}, {"id": "card_works_haversine", "title": "The great-circle distance from New York to London", "shelf": "the-works", "surface": "secular", "snippet": "Across the curved Earth, the shortest path (the haversine great-circle distance) from New York to London is about 5,570 km — the number behind every flight plan and GPS fix.  Worked & sealed by the en", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}, {"id": "card_seal_859552e9de7a87029c0bd41455db23f825a02952d2019ff3f5891a2e09e6fb12", "title": "Receipt 859552e9de7a… — sealed: record", "shelf": "seals", "surface": "secular", "snippet": "{\n \"anchors\": [],\n \"axis_coords\": {\n  \"axis\": \"geography\",\n  \"dimensions\": [\n   \"physical_substance\"\n  ]\n },\n \"gate_results\": [\n  {\n   \"details\": {\n    \"broken_at\": null,\n    \"confirmed_steps\": 1,\n   ", "authority_tier": "engine_derived", "source": "Narrow Highway engine — sealed record", "generated": false}]}