# C1018 — Order is not recoverable from a total

## Question

Can changing order preserve all boundaries after refitting the same two positions?

## Inputs

```json
{
  "diagnostic_reversed_counts": [
    10,
    24,
    25,
    26,
    27,
    28,
    29,
    30
  ]
}
```

## Sources

```json
[
  "C1017"
]
```

## Opened utc

2026-09-28T03:59:11.285749+00:00

## Results

```json
{
  "diagnostic_scale": "182/27",
  "diagnostic_anchor": "45230/27",
  "diagnostic_final": "3004/9",
  "held_source_head": 1859,
  "held_source_final": 466,
  "scope": "same-role diagnostic only; the source reverse walk retains its own roles"
}
```

## Finding

Refitting two unchanged role positions cannot restore the other boundaries after reordering. The source reverse walk is a separately indexed object, not a defective version of the forward path.

## Reassessment

Audit the independence of the two marked NT Key returns.

## Checks

```json
{
  "fitted_scale": true,
  "head_rejects": true,
  "tail_rejects": true
}
```

## Closed utc

2026-09-28T03:59:11.286451+00:00

## Record provenance

Exact record hash: `ddd32fc0f100c10a197023638af74a67769b63897af9ef35e07bd6ba688e0064`

Source journal: `Research_Cycles/C0932_C1131/journal.json`