{"id": "c1037", "title": "C1037 — Twin-arm terminal condition", "filename": "C1037.md", "role": "Research action", "step": 1037, "sha256": "a811e12aa966351a458e327299b39f5722a21178fab14ff7534022c0bead10d6", "bytes": 1019, "origins": ["C480–C1634/Research_Cycles/C0932_C1131/journal.json#C1037"], "download": "/sources/a811e12aa966351a458e327299b39f5722a21178fab14ff7534022c0bead10d6.md", "format": "md", "derived": true, "tags": [], "excerpt": "What does the second161 arm add after the biographies are fixed?", "content": "# C1037 — Twin-arm terminal condition\n\n## Question\n\nWhat does the second161 arm add after the biographies are fixed?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"File60 §3.2\",\n  \"C1036\"\n]\n```\n\n## Opened utc\n\n2026-09-28T04:03:41.802265+00:00\n\n## Results\n\n```json\n{\n  \"arms\": [\n    161,\n    161\n  ],\n  \"terminal_required_by_symmetry\": 1406,\n  \"retained_source_terminal\": 1406,\n  \"A4_residual\": 0\n}\n```\n\n## Finding\n\nWith biographies fixed, twin arms impose one condition on the retained terminal. The terminal1406 is source-appointed; the calculation identifies its role rather than selecting it by search.\n\n## Reassessment\n\nTest Joseph’s span against that same terminal and its relationship to the other conditions.\n\n## Checks\n\n```json\n{\n  \"twin_arms\": true,\n  \"terminal_agrees\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T04:03:41.802869+00:00\n\n## Record provenance\n\nExact record hash: `367da05e2f6c83cb0ac1bad440cb59947081ad4f8519777549768e5fe3cff193`\n\nSource journal: `Research_Cycles/C0932_C1131/journal.json`", "journalDownload": "/sources/f6bdc7aaaaa4fd40f1151b367204ddee7f0f9b77a9c43ae8764831b52d862670.json", "evidenceLinks": [{"id": "d-12a48221b7fdcdcd", "title": "File 60"}]}