{"id": "c899", "title": "C899 — Recover the two complete civil comparison squares", "filename": "C899.md", "role": "Research action", "step": 899, "sha256": "3209d3d137d28201ccfe3da0dffe15e43bd49be39b3bedf234b06a69a269c928", "bytes": 1457, "origins": ["C480–C1634/Research_Cycles/C0832_C0931/journal.json#C899"], "download": "/sources/3209d3d137d28201ccfe3da0dffe15e43bd49be39b3bedf234b06a69a269c928.md", "format": "md", "derived": true, "tags": [], "excerpt": "Do the paired30 shifts preserve each entire source-appointed arm?", "content": "# C899 — Recover the two complete civil comparison squares\n\n## Question\n\nDo the paired30 shifts preserve each entire source-appointed arm?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"File63 §7.9\"\n]\n```\n\n## Opened utc\n\n2026-09-28T02:53:18.757043+00:00\n\n## Results\n\n```json\n{\n  \"squares\": [\n    {\n      \"civil_nodes\": [\n        -145600,\n        -2080,\n        0\n      ],\n      \"body\": 143520,\n      \"terminal\": 2080,\n      \"total\": 145600,\n      \"source_total\": 145600\n    },\n    {\n      \"civil_nodes\": [\n        -145570,\n        -2050,\n        30\n      ],\n      \"body\": 143520,\n      \"terminal\": 2080,\n      \"total\": 145600,\n      \"source_total\": 145600\n    }\n  ],\n  \"artifact\": {\n    \"path\": \"model/paired_civil_squares.json\",\n    \"sha256\": \"f93729bd50b8e39a077d0776e95f581e7288413a6c66c4468be2912ad4f82e8b\",\n    \"bytes\": 330\n  }\n}\n```\n\n## Finding\n\nBoth complete arms decompose145600 as143520+2080. Their corresponding civil nodes all shift by30, including1BC→AD30. The equality uses civil crossing and preserves the source-appointed comparison roles.\n\n## Reassessment\n\nIntegrate the carrier lift and retained-subdivision result into the common grammar.\n\n## Checks\n\n```json\n{\n  \"whole_arms\": true,\n  \"translation\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T02:53:18.758352+00:00\n\n## Record provenance\n\nExact record hash: `82ef13c003106d94a0ac3e160b171e20cfa6e17ee4fb630d742904f83c7ad7c5`\n\nSource journal: `Research_Cycles/C0832_C0931/journal.json`", "journalDownload": "/sources/6a37be4e218f9f467cbde5e9db3723ce9c79dc78cc97d1a289422b96cb9971e0.json", "evidenceLinks": [{"id": "d-f93729bd50b8e39a", "title": "model/paired_civil_squares.json"}, {"id": "d-180803601a2db301", "title": "File 63"}]}