# C797 — Recover the positive BJ reflection object

## Question

Which four source comparison nodes actually form a closed reflection?

## Inputs

```json
{}
```

## Sources

```json
[
  "File53 §3A.4 lines342–347"
]
```

## Opened utc

2026-09-28T02:06:34.235389+00:00

## Results

```json
{
  "reflection": {
    "path": "model/BJ_comparison_reflection.json",
    "sha256": "38d055e40f414f1f81cb0a59da296ada9114cd9dd0b1a5f56d5a1c4bf30f7227",
    "bytes": 510
  },
  "coordinates": [
    3149,
    2649,
    2549,
    2049
  ],
  "center": 2599,
  "reflected": [
    2049,
    2549,
    2649,
    3149
  ]
}
```

## Finding

The selected four-node comparison closes under reflection about2599. Its table explicitly uses original Noah/Shem/Flood nodes with compressed Creation, so closure belongs to this comparison object.

## Reassessment

Test whether this object is the same as the uniformly expunged chronology.

## Checks

```json
{
  "closure": true,
  "both_arms": true
}
```

## Closed utc

2026-09-28T02:06:34.236073+00:00

## Record provenance

Exact record hash: `e98ae111aee7e1a80e1897cb6b0060d4239d9bc7e5fc4d0f34fd8fd2a7d3c50b`

Source journal: `Research_Cycles/C0732_C0831/journal.json`