{"id": "c253", "title": "C253 — The final 1250 interval has same-Gear Noah/Flood endpoints", "filename": "490d_C253_529_Mirror_Bounded_Step_20260923.md", "role": "Research action", "step": 253, "sha256": "723a38337e64dfee6a151daa73eb0570e1593a98c92d33b96148104dd2a557f9", "bytes": 2300, "origins": ["C01–C479/reference/490d_C01_C265_Complete_Window_Archive_20260923.zip!/workspace/mirror_C206_C265_529_Expansion_Centers_20260923/C253/490d_C253_529_Mirror_Bounded_Step_20260923.md"], "download": "/sources/723a38337e64dfee6a151daa73eb0570e1593a98c92d33b96148104dd2a557f9.md", "format": "md", "derived": false, "tags": ["Regular", "Mirror / 529"], "excerpt": "C253 — The final 1250 interval has same-Gear Noah/Flood endpoints\n\n23 September 2026 · Step 48 of 60, continuing C205.\n\nThe final 13-fold SP Noah endpoint and the new double-11 MT Flood endpoint have the same Gear in all six admitted rows. Primary Noah pairs with Flood start; companion Noah pairs with Flood close. Thei", "content": "# C253 — The final 1250 interval has same-Gear Noah/Flood endpoints\n\n23 September 2026 · Step 48 of 60, continuing C205.\n\nThe final 13-fold SP Noah endpoint and the new double-11 MT Flood endpoint have the same Gear in all six admitted rows. Primary Noah pairs with Flood start; companion Noah pairs with Flood close. Their span is always 1250=2×625.\n\n| Gear | SP Noah rail | MT Flood state | Flood center | Noah center | Width |\n|---|---|---|---|---|---|\n| 1 | companion | Flood close | 2455 | 3705 | 1250 |\n| 1 | primary | Flood start | 2456 | 3706 | 1250 |\n| 2 | companion | Flood close | 2457 | 3707 | 1250 |\n| 2 | primary | Flood start | 2458 | 3708 | 1250 |\n| 3 | companion | Flood close | 2459 | 3709 | 1250 |\n| 3 | primary | Flood start | 2460 | 3710 | 1250 |\n\nFor the primary rows this is the sourced 600-year MT Noah-to-Flood interval plus the 650-year SP–MT Noah displacement. Moving both terminal points one year earlier preserves 1250 for companion/close rows. That explanation does not introduce an MT Noah companion event at the internal join.\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**24 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"}]}