# C894 — Identify the information lost by a body-only comparison

## Question

Can the expanded span alone recover a macro head?

## Inputs

```json
{}
```

## Sources

```json
[
  "C892–893"
]
```

## Opened utc

2026-09-28T02:52:09.333941+00:00

## Results

```json
{
  "equal_body_pairs": {
    "144900": [
      {
        "id": "cumulative_Levi_upper",
        "R": 1936,
        "M": 146836
      },
      {
        "id": "cumulative_Levi_lower",
        "R": 1933,
        "M": 146833
      }
    ],
    "143520": [
      {
        "id": "apparent_Covenant",
        "R": 2081,
        "M": 145601
      },
      {
        "id": "Creation_offering",
        "R": 2051,
        "M": 145571
      }
    ]
  },
  "artifact": {
    "path": "model/carrier_body_information_loss.json",
    "sha256": "330ec0621328d7de77209faf09a0003e9b22151cd0be27619f1d8443a7a90c3a",
    "bytes": 652
  }
}
```

## Finding

Identical144900 or143520 bodies occupy different source-appointed positions. A body-only match loses a translation coordinate; retaining the target restores the numeric pair, while source labels still need their own record.

## Reassessment

Reconstruct the entire ordered carrier chain from endpoint changes.

## Checks

```json
{
  "two_pairs": true,
  "different_positions": true,
  "recovery": true
}
```

## Closed utc

2026-09-28T02:52:09.334595+00:00

## Record provenance

Exact record hash: `5afb6ddb57a4d8862a2518710dd548d3abade79435eaa26d4715c6f737357b3f`

Source journal: `Research_Cycles/C0832_C0931/journal.json`