{"id": "c250", "title": "C250 — The closing member and full-week residual remain excluded", "filename": "490d_C250_529_Mirror_Bounded_Step_20260923.md", "role": "Research action", "step": 250, "sha256": "02e8ddbec6dc49ff9895c7baa9db207f59f975933b06ad9c86d2a6be86ab2f26", "bytes": 1903, "origins": ["C01–C479/reference/490d_C01_C265_Complete_Window_Archive_20260923.zip!/workspace/mirror_C206_C265_529_Expansion_Centers_20260923/C250/490d_C250_529_Mirror_Bounded_Step_20260923.md"], "download": "/sources/02e8ddbec6dc49ff9895c7baa9db207f59f975933b06ad9c86d2a6be86ab2f26.md", "format": "md", "derived": false, "tags": ["Regular", "Mirror / 529"], "excerpt": "C250 — The closing member and full-week residual remain excluded\n\n23 September 2026 · Step 45 of 60, continuing C205.\n\nAt native Creation 4414 and interior Conquest 1405, the double-expanded endpoint is 2461 and lacks source support. Pairing the same Creation closing member with Conquest 1406 instead gives 5820=11K+1; ", "content": "# C250 — The closing member and full-week residual remain excluded\n\n23 September 2026 · Step 45 of 60, continuing C205.\n\nAt native Creation 4414 and interior Conquest 1405, the double-expanded endpoint is 2461 and lacks source support. Pairing the same Creation closing member with Conquest 1406 instead gives 5820=11K+1; after two expansions its excess is 625/529, not an integer correction.\n\nC09’s separately conditional compressed origin 4413 would give a 6875 output at 2462, also absent from the held event register. The current six-row result needs neither that compression nor an extended Creation week. All three boundary cases remain explicitly separate.\n\n## Evidence and scope\n\nK=529 and r=25/23. BC base B means (B+1)t/Bn BC; reflected AD base A means AD At/(A+1)n. Their civil span is B+A in both seasonal components, with no year zero. Signed paired centers are −B and +A; the center model uses components ±1/4 and restores this separation after dilation. An interval center is geometry, not an event or a proposed universal Mirror axis.\n\nRegular Gears are restricted to Noah/Shem/Flood. Creation and Conquest retain fixed source-field members; no fourth Gear is admitted. Generated coordinates, source-field membership and stored graph incidence are distinct. File_18/File_09 and the frozen C127 graph are unchanged. Earlier N01/N03 qualifications, the missing Shem join, closed primers and unestablished original Reports 11–25 remain unchanged. This packet selectively uses prior evidence; it does not rerun completed campaigns. Assertions and alternative placements are not independent historical witness counts.\n\n**7 step-specific checks and 19 frozen-input checks passed.** Exact inputs, results and predecessor hashes are in the accompanying JSON records; calculation code is in the evidence archive. Source dependencies are identified in the body and frozen in `sources/`.\n", "evidenceLinks": [{"id": "d-68301ab760bfbe2e", "title": "File 18"}, {"id": "d-45851004c5864229", "title": "File 09"}]}