{"id": "card_qm_entanglement", "kind": "reference", "title": "Entanglement — the world is not locally real", "body": "An entangled pair is ONE state, not two; measuring one fixes the other. Bell: no locally-real theory matches quantum predictions - CHSH is capped at 2 classically but reaches 2 sqrt(2) = 2.83 quantumly (sealed, Tsirelson), and experiment agrees (Aspect; 2022 Nobel). Many parts, one indivisible state - 'one source, states of that force'. No faster-than-light signal, so it answers to relativity.", "source": {"label": "Narrow Highway — quantum mechanics", "url": "", "authority_tier": "engine_derived"}, "shelf": "codex", "box": "quantum_mechanics", "bands": ["quantum mechanics", "pillar", "entanglement", "one map"], "subject": "Entanglement — the world is not locally real", "connections": [{"to_card_id": "card_floor_quantum_mechanics", "relationship": "part_of", "evidence": "a foundation of quantum mechanics (Entanglement)"}, {"to_card_id": "card_floor_the_capstone", "relationship": "connects_at", "evidence": "one indivisible state, many parts - 'one source, states of that force'"}, {"to_card_id": "card_floor_relativity", "relationship": "connects_at", "evidence": "entanglement correlates without signalling: no faster-than-light message, so relativity holds"}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "call": "codex.quantum.mechanics", "facets": {"subject": ["entanglement", "one map", "pillar", "quantum mechanics"]}, "presentation": {"glyph": "•", "kind_label": "quantum mechanics", "by": "Narrow Highway — quantum mechanics", "authority": "engine_derived", "posted": "", "standing": ""}, "neighbors": [{"id": "card_floor_quantum_mechanics", "title": "Quantum mechanics — the quantum and its limits", "relationship": "part of", "why": "a foundation of quantum mechanics (Entanglement)", "href": "/card/card_floor_quantum_mechanics", "resolved": true}, {"id": "card_floor_the_capstone", "title": "The capstone — one source, many potentials, one end", "relationship": "connects at", "why": "one indivisible state, many parts - 'one source, states of that force'", "href": "/card/card_floor_the_capstone", "resolved": true}, {"id": "card_floor_relativity", "title": "Relativity — many frames, one invariant", "relationship": "connects at", "why": "entanglement correlates without signalling: no faster-than-light message, so relativity holds", "href": "/card/card_floor_relativity", "resolved": true}], "house": {"door": "FIND", "kind": "card", "trail": "connections", "seal": "/card/card_qm_entanglement", "next_step": {"do": "follow a connection: what this card rests on, and what rests on it", "door": "FIND", "tool": "card_connections", "params": {"id": "card_qm_entanglement"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}