# C1531 — Freeze the next cumulative partition test

## Question

Does the common Noah950+Shem600 pair explain a systematic refinement response in all three MSS?

## Sources

```json
[
  "File18.md §6",
  "File51a.md §16.2",
  "agents/cumulative_noah_extension.json"
]
```

## Opened utc

2026-09-29T02:33:31.368727+00:00

## Results

```json
{
  "source_pairs": {
    "MT": [
      6386,
      5436,
      4836
    ],
    "LXX": [
      7296,
      6346,
      5746
    ],
    "SP": [
      6266,
      5316,
      4716
    ]
  },
  "fixed_anchor": 1406,
  "planned_partitions": [
    "F",
    "S",
    "N",
    "FS",
    "FN",
    "SN",
    "FSN"
  ],
  "rules": "original legs only; retainedtrailingzeros; once perleg; nosecondreversal"
}
```

## Finding

The shared serial950+600 source pair supplies the next bounded extension; the prior Regular600 age is not substituted.

## Reassessment

Review every section of theStrategy before proceeding to the new partition calculations.

## Checks

```json
{}
```

## Closed utc

2026-09-29T02:33:31.369074+00:00

## Record provenance

Exact record hash: `269fffa141143518d83aef561a0e3797f4e7b8ce57c66d9d12982d495c5a23f8`

Source journal: `Research_Cycles/C1483_C1582/c1483_c1582/journal.json`