{"id": "c490", "title": "C490 — SP’s positive rounded contribution", "filename": "C490.md", "role": "Research action", "step": 490, "sha256": "666019adb43e011b4266ed32830cbf421c8d7caff432e05aa70919a3dca887df", "bytes": 1295, "origins": ["C480–C1634/Research_Cycles/C0482_C0531/journal.json#C490"], "download": "/sources/666019adb43e011b4266ed32830cbf421c8d7caff432e05aa70919a3dca887df.md", "format": "md", "derived": true, "tags": ["Cumulative", "Rounded"], "excerpt": "What supplied SP relationship can enter the shared grammar unchanged?", "content": "# C490 — SP’s positive rounded contribution\n\n## Question\n\nWhat supplied SP relationship can enter the shared grammar unchanged?\n\n## Inputs\n\n```json\n{\n  \"creation_block\": [\n    4416,\n    4411\n  ],\n  \"conquest_block\": [\n    1406,\n    1401\n  ],\n  \"nativity_block\": [\n    6,\n    1\n  ],\n  \"MT_creation_block\": [\n    4111,\n    4106\n  ]\n}\n```\n\n## Sources\n\n```json\n[\n  \"File51a §17.4\"\n]\n```\n\n## Opened utc\n\n2026-09-27T22:40:02.227524+00:00\n\n## Results\n\n```json\n{\n  \"conquest_widths\": [\n    3010,\n    3010\n  ],\n  \"nativity_widths\": [\n    4410,\n    4410\n  ],\n  \"SP_minus_MT\": [\n    305,\n    305\n  ],\n  \"Terah_plus60_comparison\": [\n    365,\n    365\n  ]\n}\n```\n\n## Finding\n\nSP supplies a block translation: both members preserve3010=7×430 to Conquest and4410=9×490 to Nativity. This is a different positive realization of the common span-and-state grammar, without replacing4416/4411 by4406.\n\n## Reassessment\n\nComplete the LXX lifespan reconstruction, then consolidate the cross-family result.\n\n## Checks\n\n```json\n{\n  \"conquest\": true,\n  \"nativity\": true,\n  \"state_shift\": true\n}\n```\n\n## Closed utc\n\n2026-09-27T22:40:02.227840+00:00\n\n## Record provenance\n\nExact record hash: `27dc1bcb3a0ec7aedd0095603ad0b3c1ed826497488a575b040e8107c3e225ff`\n\nSource journal: `Research_Cycles/C0482_C0531/journal.json`", "journalDownload": "/sources/6eaeccad4734eff2f6ac20ba847967877b944f9758c53c712ac8b5be2ddf61eb.json", "evidenceLinks": [{"id": "d-d8aa38afb2a2df8f", "title": "File 51a"}]}