# C1269 — Expose the source-life differences hidden by the NT birth projection

## Question

What does theCumulative rowmeasure retain in thesamebirth-identicalsuffix?

## Inputs

```json
{}
```

## Sources

```json
[
  "C1268",
  "C1165"
]
```

## Opened utc

2026-09-28T05:49:04.206649+00:00

## Results

```json
{
  "hidden_lives": {
    "path": "model/NT_birth_projection_hidden_lives.json",
    "sha256": "7b560e40d46a5b3dd387c3b04994ccb79f2bac1ef97db39078a8332bf335a6a4",
    "bytes": 752
  },
  "differences": [
    {
      "name": "Shelah",
      "LXX_minus_SP_life": 27
    },
    {
      "name": "Eber",
      "LXX_minus_SP_life": 100
    },
    {
      "name": "Peleg",
      "LXX_minus_SP_life": 100
    },
    {
      "name": "Reu",
      "LXX_minus_SP_life": 100
    },
    {
      "name": "Serug",
      "LXX_minus_SP_life": 100
    },
    {
      "name": "Nahor",
      "LXX_minus_SP_life": 60
    },
    {
      "name": "Terah",
      "LXX_minus_SP_life": 60
    }
  ],
  "sum": 547
}
```

## Finding

Seven oftheten birth-identicalrows stillhavedifferentlifespans:27, four100s andtwo60s, totaling547. TheNT birthcomparison cannot see these; theCumulative source-row measurementcan.

## Reassessment

RetainCainan’s ownNT cell toillustrate thedifferencebetweenlistwidth andbiographicalmeasure.

## Checks

```json
{
  "seven": true,
  "sum547": true,
  "values": true
}
```

## Closed utc

2026-09-28T05:49:04.207177+00:00

## Record provenance

Exact record hash: `1fe90c4abb12d347f06c18f050c0418851f7930083e47dac870ca6bafbd70ca3`

Source journal: `Research_Cycles/C1132_C1431_Recovered/journal.json`