{"id": "c1224", "title": "C1224 — Derive the Regular rectangle radius from source row changes", "filename": "C1224.md", "role": "Research action", "step": 1224, "sha256": "8ab6d0a30510b32dbe85e8b894e08c4ea0357679502067d80864a34ec811eedb", "bytes": 1235, "origins": ["C480–C1634/Research_Cycles/C1132_C1431_Recovered/journal.json#C1224"], "download": "/sources/8ab6d0a30510b32dbe85e8b894e08c4ea0357679502067d80864a34ec811eedb.md", "format": "md", "derived": true, "tags": ["Regular", "Cumulative"], "excerpt": "Can the reconstructed source changes account for the Regular2760 input?", "content": "# C1224 — Derive the Regular rectangle radius from source row changes\n\n## Question\n\nCan the reconstructed source changes account for the Regular2760 input?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"C1223\",\n  \"C1143\",\n  \"C1157\",\n  \"File22 Actual4114\"\n]\n```\n\n## Opened utc\n\n2026-09-28T05:33:42.643569+00:00\n\n## Results\n\n```json\n{\n  \"regular_provenance\": {\n    \"path\": \"model/SP_rectangle_regular_provenance.json\",\n    \"sha256\": \"2f8b03fe5ba73a792a2d88f7055f234c51f0dab12223a1293ccf05731dcd1893\",\n    \"bytes\": 343\n  },\n  \"radius\": 2760\n}\n```\n\n## Finding\n\nThe Regular input2760 decomposes into the MT baseline radius, post-Flood+650, pre-Flood−350, the declared−215 frame change and the seven-year wrapper. The row grammar explains the two genealogical changes; frame and wrapper remain source premises.\n\n## Reassessment\n\nGenerate the Cumulative radius using the cap loss and post-Flood life changes.\n\n## Checks\n\n```json\n{\n  \"native4199\": true,\n  \"opening4206\": true,\n  \"radius2760\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T05:33:42.644030+00:00\n\n## Record provenance\n\nExact record hash: `3abc7c0960048edb4471a5b3c9cbc5a486f27fee458dae2aa6faa6cfb8b34701`\n\nSource journal: `Research_Cycles/C1132_C1431_Recovered/journal.json`", "journalDownload": "/sources/6adb632ce171623c2bce60d7ed58ae319ccb379cf76b751c0a477c1742fd348c.json", "evidenceLinks": [{"id": "d-2f8b03fe5ba73a79", "title": "model/SP_rectangle_regular_provenance.json"}, {"id": "d-1c77fd504afbf59b", "title": "File 22"}]}