# C1214 — Compute the Rounded common-row change field

## Question

Where do the five source amplitudes change after rounding?

## Inputs

```json
{}
```

## Sources

```json
[
  "C1182",
  "C1213"
]
```

## Opened utc

2026-09-28T05:29:08.314535+00:00

## Results

```json
{
  "rounded_field": {
    "path": "model/whole_genealogy_rounded_changes.json",
    "sha256": "59c733198e1c6b2dca7c08d425e2a4764198b31dcf334d79cc93652e6fc96cd3",
    "bytes": 3065
  },
  "changed_rows": [
    "Lamech",
    "Arphaxad",
    "Shelah"
  ]
}
```

## Finding

Only Lamech and the Arphaxad/Shelah pair change their lifespan-difference amplitudes:−24 becomes−20, while each27 becomes25. Every common-row begetting difference survives exactly.

## Reassessment

Determine why the whole Cumulative head difference nevertheless stays unchanged.

## Checks

```json
{
  "three_changes": true,
  "all_birth_deltas": true
}
```

## Closed utc

2026-09-28T05:29:08.315419+00:00

## Record provenance

Exact record hash: `ee4e3ed3d9b2e34ce4da147b4003e4f17ab25b5e1de1a1007370eb18eedb87ca`

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