{"id": "card_v_ba246361cb43", "kind": "verified", "title": "N = 100·½¹ = 50 after one half-life", "body": "Verdict: HOLDS.\n• geology.radiometric_decay: 100.0 · 2^(−5730.0/5730.0) = 50 after 1 half-lives (matches claim 50.0)\nSealed and independently re-checkable: https://narrowhighway.com/s/f1ed7b8e8b7b481a744624ba348dd9f1f00a5c94ddca55cd59170495cd9d8256", "source": {"label": "Verified by the engine — geology", "url": "https://narrowhighway.com/s/f1ed7b8e8b7b481a744624ba348dd9f1f00a5c94ddca55cd59170495cd9d8256", "ref": "", "domain": "geology", "authority_tier": "engine"}, "shelf": "geology", "box": "verified", "bands": ["verified", "geology", "HOLDS"], "connections": [{"to_card_id": "card_k_spine_created_order", "relationship": "part_of", "evidence": "a verified seed of the created order (geology)"}, {"to_card_id": "card_works_radiometric", "relationship": "demonstrates", "evidence": "A worked demonstration in the same field (geology)."}], "author": "engine", "created_at": 1784892568.0358064, "updated_at": 1784892568.035807, "visibility": "public", "lifecycle_stage": "public", "volatility": "durable", "surface": "secular", "generated": false, "presentation": {"glyph": "•", "kind_label": "verified", "by": "Verified by the engine — geology", "authority": "engine", "posted": "1 month ago", "standing": "", "link": {"url": "https://narrowhighway.com/s/f1ed7b8e8b7b481a744624ba348dd9f1f00a5c94ddca55cd59170495cd9d8256", "host": "narrowhighway.com", "provider": "", "titled": "N = 100·½¹ = 50 after one half-life", "waybill_line": "", "reach": "", "embed": ""}}, "neighbors": [{"id": "card_k_spine_created_order", "title": "The created order — the science of the floor", "relationship": "part of", "why": "a verified seed of the created order (geology)", "href": "/card/card_k_spine_created_order", "resolved": true}, {"id": "card_works_radiometric", "title": "One half-life of a radioactive clock", "relationship": "demonstrates", "why": "A worked demonstration in the same field (geology).", "href": "/card/card_works_radiometric", "resolved": true}]}