# C269 final independent review

Reviewed the final C269 report, checkpoint, and exact verifier for material mathematical and provenance errors. No material error found.

- The4+864 and2+866 attachment refinements preserve the original868/8993 comparisons and correctly distinguish newly recorded subdivisions from stored graph edges.
- The exact Shem closing source, unequal-selector598 comparison, final2-year interval, and same-index600 closing separation retain their distinct roles.
- C254 selector7 is correctly treated as inherited positive support: its6875 prefix reaches sourced MT G3 Flood2460; the separate exact6877 candidate2462 remains unsupported.
- The closing600-by8993 rectangle and both598+2 subdivisions have correct source coordinates and matching-season widths. Its dependence on retained relations is explicit, with no new independent-witness claim.
- The full source-path translations and C268 affine charts remain correctly distinguished by source anchor, slope, phase spacing, and phase-component-to-pair-center role change.
- A separate verifier execution passed145 assertions and produced six evidence files in C269_review/final_replay.

No C270 work, wider event search, canonical modification, graph mutation, or upload was performed by this review.