# C547 — Repeated270 windows are caused by ordered lifespans

## Question

What generates the two Levitical270 windows and their phase companions?

## Inputs

```json
{
  "trunk": [
    1933,
    1796,
    1663,
    1526
  ],
  "lifespans": [
    137,
    133,
    137
  ],
  "phase_offsets": [
    0,
    3,
    "7/2"
  ]
}
```

## Sources

```json
[
  "File60 §§9.6–9.8"
]
```

## Opened utc

2026-09-28T00:05:08.720035+00:00

## Results

```json
{
  "two_windows": [
    270,
    270
  ],
  "two_window_anatomy": [
    [
      137,
      133
    ],
    [
      133,
      137
    ]
  ],
  "one_endpoint_phase_windows": [
    270,
    273,
    "547/2"
  ],
  "both_endpoint_translation": "keeps270",
  "cross_branch_Levi_life": [
    137,
    140,
    "281/2"
  ]
}
```

## Finding

The repeated137 flank makes137+133 and133+137 equal270. Moving only the earlier endpoint adds the chosen3 or3.5 branch offset, giving273 or273.5; moving both preserves270. Thus the repeated value is source-order conservation, while the companion depends on the stated phase display.

## Reassessment

Test how the chronology joins imported census scalars without claiming a new census derivation.

## Checks

```json
{
  "windows": true,
  "exact_phase": true
}
```

## Closed utc

2026-09-28T00:05:08.720278+00:00

## Record provenance

Exact record hash: `2800211fe588a17377d317b74aa0516ee17a33e648d21fa89ec852ffe72413ef`

Source journal: `Research_Cycles/C0532_C0631/journal.json`