{"id": "c209", "title": "C209 — The two right-endpoint midpoints have unequal source status", "filename": "490d_C209_529_Mirror_Bounded_Step_20260923.md", "role": "Research action", "step": 209, "sha256": "3a816c974f608aeede094ac9d8b214b7f45c6ad57a5b87137d4debe8500d8a1f", "bytes": 1997, "origins": ["C01–C479/reference/490d_C01_C265_Complete_Window_Archive_20260923.zip!/workspace/mirror_C206_C265_529_Expansion_Centers_20260923/C209/490d_C209_529_Mirror_Bounded_Step_20260923.md"], "download": "/sources/3a816c974f608aeede094ac9d8b214b7f45c6ad57a5b87137d4debe8500d8a1f.md", "format": "md", "derived": false, "tags": ["Regular", "Mirror / 529"], "excerpt": "C209 — The two right-endpoint midpoints have unequal source status\n\n23 September 2026 · Step 4 of 60, continuing C205.\n\nThe first midpoint is a retained SP companion Noah-death reflection. Its image under the same Creation-anchored map is not a retained Noah/Shem/Flood event in the 48-row C01 register.\n\n| Chain index |", "content": "# C209 — The two right-endpoint midpoints have unequal source status\n\n23 September 2026 · Step 4 of 60, continuing C205.\n\nThe first midpoint is a retained SP companion Noah-death reflection. Its image under the same Creation-anchored map is not a retained Noah/Shem/Flood event in the 48-row C01 register.\n\n| Chain index | Midpoint of Flood–MT Noah | Midpoint of MT–SP Noah | Status |\n|---|---|---|---|\n| 3 | 2757 | 3381 | source / generated |\n| 5 | 2759 | 3383 | source / generated |\n\nThe map preserves the midpoint equation exactly, but does not preserve the named-event status of that midpoint. The negative conclusion is limited to this held regular event register; it does not assert that 3381 or 3383 is absent from every chronological construction.\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**6 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"}]}