{"id": "c847", "title": "C847 — Resolve the female register as a two-endpoint measurement", "filename": "C847.md", "role": "Research action", "step": 847, "sha256": "f67e3fdc8035588f1a9d8d62464e6868a336e1f8e867289caf2857c55c283849", "bytes": 1405, "origins": ["C480–C1634/Research_Cycles/C0832_C0931/journal.json#C847"], "download": "/sources/f67e3fdc8035588f1a9d8d62464e6868a336e1f8e867289caf2857c55c283849.md", "format": "md", "derived": true, "tags": [], "excerpt": "How do400/430/470/490 arise when the chronological endpoints also change?", "content": "# C847 — Resolve the female register as a two-endpoint measurement\n\n## Question\n\nHow do400/430/470/490 arise when the chronological endpoints also change?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"File58 §13.2\"\n]\n```\n\n## Opened utc\n\n2026-09-28T02:34:10.947709+00:00\n\n## Results\n\n```json\n{\n  \"female_source_counts\": [\n    200,\n    200,\n    30,\n    40,\n    20\n  ],\n  \"prefix_register\": [\n    200,\n    400,\n    430,\n    470,\n    490\n  ],\n  \"chronology_heads\": [\n    1846,\n    1876,\n    1876,\n    1896\n  ],\n  \"chronology_tails\": [\n    1446,\n    1446,\n    1406,\n    1406\n  ],\n  \"span_changes\": [\n    {\n      \"head\": 30,\n      \"tail\": 0,\n      \"span\": 30\n    },\n    {\n      \"head\": 0,\n      \"tail\": -40,\n      \"span\": 40\n    },\n    {\n      \"head\": 20,\n      \"tail\": 0,\n      \"span\": 20\n    }\n  ]\n}\n```\n\n## Finding\n\nThe30,40,20 increments come respectively from an earlier head, a later tail, and an earlier head. This is a two-endpoint span register, not one chronology walk from a fixed anchor.\n\n## Reassessment\n\nTest a second list’s declared regroupings against the same measurement grammar.\n\n## Checks\n\n```json\n{\n  \"register\": true,\n  \"spans\": true,\n  \"response\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T02:34:10.948250+00:00\n\n## Record provenance\n\nExact record hash: `75a3eecb4487f377d76dae23d3fa35c90c40d9b1c4d5bbde0a992478b86c4f62`\n\nSource journal: `Research_Cycles/C0832_C0931/journal.json`", "journalDownload": "/sources/6a37be4e218f9f467cbde5e9db3723ce9c79dc78cc97d1a289422b96cb9971e0.json", "evidenceLinks": [{"id": "d-924db415dff003d2", "title": "File 58"}]}