{"query": "haversine(NYC → London) ≈ 5,570 km", "count": 2, "results": [{"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}]}