{"id": "c258", "title": "C258 — The selected 6875 interval lies 191 years before the SP 17-fold center", "filename": "490d_C258_529_Mirror_Bounded_Step_20260923.md", "role": "Research action", "step": 258, "sha256": "04e1e15fb5b326adcf904a270b93b74340a99a7ffcfe2f581e54ac2651d1b838", "bytes": 2137, "origins": ["C01–C479/reference/490d_C01_C265_Complete_Window_Archive_20260923.zip!/workspace/mirror_C206_C265_529_Expansion_Centers_20260923/C258/490d_C258_529_Mirror_Bounded_Step_20260923.md"], "download": "/sources/04e1e15fb5b326adcf904a270b93b74340a99a7ffcfe2f581e54ac2651d1b838.md", "format": "md", "derived": false, "tags": ["Regular", "Counts & NT", "Mirror / 529"], "excerpt": "C258 — The selected 6875 interval lies 191 years before the SP 17-fold center\n\n23 September 2026 · Step 53 of 60, continuing C205.\n\nAcross all six rows, the center of the 6875 Creation-to-Flood interval is 191 years earlier than the enclosing SP 17-fold center. The unequal outer flanks are 868 and 1250, giving (1250−86", "content": "# C258 — The selected 6875 interval lies 191 years before the SP 17-fold center\n\n23 September 2026 · Step 53 of 60, continuing C205.\n\nAcross all six rows, the center of the 6875 Creation-to-Flood interval is 191 years earlier than the enclosing SP 17-fold center. The unequal outer flanks are 868 and 1250, giving (1250−868)/2=191.\n\n| s | 6875 interval center | SP 17-fold center | Gap |\n|---|---|---|---|\n| 2 | -1965/2 | -1583/2 | 191 |\n| 3 | -1963/2 | -1581/2 | 191 |\n| 4 | -1961/2 | -1579/2 | 191 |\n| 5 | -1959/2 | -1577/2 | 191 |\n| 6 | -1957/2 | -1575/2 | 191 |\n| 7 | -1955/2 | -1573/2 | 191 |\n\nC201 already expresses this value as the δ=2 case of its center grammar. The new result is a source selector for that case: the twice-expanded native 11-fold family. The 191 value is therefore integrated as a dependent geometric consequence, not newly counted as an independent numerical witness.\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**12 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"}]}