# C1270 — Restore the native Cainan row in the NT interface

## Question

How do a70-yearNT cell and a130-yearsourceinterval coexist atCainan?

## Inputs

```json
{}
```

## Sources

```json
[
  "C1267",
  "prep/nt_source_transfer.json"
]
```

## Opened utc

2026-09-28T05:49:06.206453+00:00

## Results

```json
{
  "Cainan_interface": {
    "path": "model/NT_native_Cainan_interface.json",
    "sha256": "29ec284f1630b8b563ff6e09c4117ee3d61ff92a4b69f04dc14f196a9d4bce50",
    "bytes": 866
  },
  "values": [
    1465,
    1530,
    1590
  ]
}
```

## Finding

The nativeArphaxad–Cainan–Shelah comparison runs1465→1530→1590. Its changes65 and60 equal source135/130 minusNT70, distinguishing thelist measure from thegenealogicalone.

## Reassessment

Connect theNT headpartition to thealreadyreconstructedMT/LXX Roundedheads withproperstateroles.

## Checks

```json
{
  "values": true,
  "source_gaps": true,
  "NTgaps": true
}
```

## Closed utc

2026-09-28T05:49:06.210050+00:00

## Record provenance

Exact record hash: `1df341a37f46100ade1c47c37addd820df1407dc5ca9fdef9614b8d4e8f1245d`

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