# C315 — SP biography and fixed8395 Flood path: source review

24 September 2026. Separate source/method review of the bounded C315 test after C314. No later numbered step is executed here.

## Controlling source roles

File_18 §3.1.4 supplies SP full430 / Cainan OFF / Terah0 Flood start→close pairs G3=3110→3109, G2=3108→3107, G1=3106→3105. Every close is the end of its Gear's one-year Flood event. It is not a Flood companion generated by the person-station operation. The regular Gear domain remains Noah/Shem/Flood only; fixed Arphaxad3106 does not move with these Gears.

File_18 §3.2.1 supplies native Noah/Shem primary and lower-companion stations; +215 gives their full430 values. Matched Noah birth/death preserve950, matched Shem birth/death600, matched Noah/Shem births500. The primary Noah death has the stated inclusive/harmonic qualification; the companion death has the ordinary-companion qualification. A checked950 coordinate difference does not erase these source qualifications or establish a new independent attestation.

On each Gear the primary Noah birth binds to that Gear's Flood start at600 and primary Noah death at950, leaving350 after Flood start. The lower companion birth binds to the same Gear's Flood close at600 and lower companion death at950, leaving350 after Flood close. File_18 states the G2 post-Flood350 pairs expressly and warns that start→companion death gives351. This is a legitimate role-sensitive biography comparison, not authorization to apply the SP companion operator to the Flood event.

Shem's same-rail birth is100 before the correspondingly chosen Flood boundary. For a companion Shem relative to Flood start, the source separately states99 and the ordinal qualification. A report must say which boundary is in use rather than treating the start and close as interchangeable.

## Fixed8395 test and interpretation

C307 fixes the two transports n=q+8993 and r=q+8395. Their difference598 is dependent on these constants. Applying C314's index/phase reversal to both preserves that598 difference component by component. It cannot by itself turn598 into the same-biography600 relation.

For a matched source Noah n, the coherent boundary is f=n−600, while the fixed8395 candidate is r=n−598=f+2 in BC numerical labels. Thus r is two years earlier than the coherent boundary. Where it meets an admitted SP Flood boundary, its correct label is the next higher Gear's start (primary case) or close (companion case). This is an admissible qualified cross-Gear coordinate comparison, not the same-Gear Noah/Flood biography. At the upper Gear boundary the candidate has no admitted higher Gear and must stay a failed source admission; no G4 or extra Flood companion is opened.

Retaining the original Noah death while substituting r changes the post-Flood difference from350 to352. Retaining the source Shem birth changes100 to98 against the chosen boundary. These differences are consequences of the same two-year mismatch, not additional independent witnesses. The source Noah950 and Shem600 lives remain intact throughout; only the attempted same-biography identification of r fails.

At phase resolution the reversal sends q+ε to R(q)−ε. Both fixed transports share that sign, so the r-versus-coherent-boundary displacement is still exactly2 for both components. It is not the half-year ancestry obstruction of C313, and seasonal re-pairing cannot be presented as its correction.

## Reporting guards

Keep separate counts for: source-valid regular biographies; direct8395 endpoint admissions; exact same-Gear/role Flood identifications; and full C287 configurations. An alias at another Gear is not a source-role match. Noah-death endpoints added here must retain source station, Gear, rail,950 qualification and ordinary context. Do not reinterpret the fixed8395 path as8393 merely to force600. No outcome establishes C311's missing annual context selector or a universal new operator.

## Suggested next bounded question

If the finite verifier confirms this obstruction, the strongest next question is whether the **already permitted one-Gear descent**, applied explicitly to the admitted8395 Flood aliases, composes with the reversed500-year correspondence while preserving all declared event roles and finite boundaries. It should be tested as a typed comparison between existing source stations, retaining failed upper/lower cases, rather than by changing8395 or extending the Gear register. This would distinguish a genuine composition of existing source actions from a fitted scalar repair. No such subsequent test is performed in this review.