# C669 — Explain every native1470 partition

## Question

Why do the source’s690+780 and720+750 measures agree?

## Inputs

```json
{
  "cell": [
    3606,
    3576,
    2886,
    2856,
    2166,
    2136
  ],
  "core": 690,
  "flank": 30
}
```

## Sources

```json
[
  "Supplement A §§1.4–1.5,2.3"
]
```

## Opened utc

2026-09-28T01:09:20.114961+00:00

## Results

```json
{
  "total": 1470,
  "partitions": [
    [
      690,
      780
    ],
    [
      720,
      750
    ]
  ],
  "flank_units": 49,
  "center": 2871,
  "central_rail_center": 2871
}
```

## Finding

All three1470 expressions reduce to2c+3f=49f. The six-node cell and its central30 rail share midpoint2871. These are decompositions of one supplied object, not independent appearances of1470.

## Reassessment

Compare the cell’s48+1 month anatomy with the supplied intercalation ledger.

## Checks

```json
{
  "total": true,
  "partitions": true,
  "center": true
}
```

## Closed utc

2026-09-28T01:09:20.115201+00:00

## Record provenance

Exact record hash: `20f6d5b48f396e9af79d36e701509405ceaf30acfd6869ce31f401e8d8756404`

Source journal: `Research_Cycles/C0632_C0731/journal.json`