{"id": "c571", "title": "C571 — Distinguish endpoint agreement from path identity", "filename": "C571.md", "role": "Research action", "step": 571, "sha256": "b9de32b2252f1853f9f157f08591a1cf1dcef44bba17e90f55d708af7fd91c6a", "bytes": 1173, "origins": ["C480–C1634/Research_Cycles/C0532_C0631/journal.json#C571"], "download": "/sources/b9de32b2252f1853f9f157f08591a1cf1dcef44bba17e90f55d708af7fd91c6a.md", "format": "md", "derived": true, "tags": ["Cumulative", "Rounded"], "excerpt": "Do whole J and terminal-cell E have the same intermediate coordinate?", "content": "# C571 — Distinguish endpoint agreement from path identity\n\n## Question\n\nDo whole J and terminal-cell E have the same intermediate coordinate?\n\n## Inputs\n\n```json\n{\n  \"head\": 14004,\n  \"junction\": 1929,\n  \"terminal\": 1446\n}\n```\n\n## Sources\n\n```json\n[\n  \"File63 §§7.3–7.4,9.7; C570\"\n]\n```\n\n## Opened utc\n\n2026-09-28T00:16:54.013518+00:00\n\n## Results\n\n```json\n{\n  \"whole_J_path\": [\n    14004,\n    \"24552/13\",\n    1404\n  ],\n  \"terminal_E_path\": [\n    14004,\n    1929,\n    1404\n  ],\n  \"junction_difference\": \"525/13\"\n}\n```\n\n## Finding\n\nBoth paths end at1404, but whole J moves the junction to24552/13 while terminal E retains1929. The new compression is equality after evaluating total span, not identity of the ordered chronological path.\n\n## Reassessment\n\nUse the shared endpoint1404 to reconstruct the Actual-to-Rounded cumulative interface.\n\n## Checks\n\n```json\n{\n  \"same_endpoint\": true,\n  \"different_junction\": true,\n  \"exact_difference\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T00:16:54.013757+00:00\n\n## Record provenance\n\nExact record hash: `948b5c185936f61251ff32ae2ee75f64584d4fc322231530d2530f057a788ec6`\n\nSource journal: `Research_Cycles/C0532_C0631/journal.json`", "journalDownload": "/sources/7a2e1117efc741218b68e2db8bb20eadd33cab34e00384e9b903708031da1d2d.json", "evidenceLinks": [{"id": "d-180803601a2db301", "title": "File 63"}]}