# C1192 — Compute joint Rounded fibres on all ordinary source rows

## Question

Which rows remain exactly identifiable when exact life and both rounded parts are retained?

## Inputs

```json
{}
```

## Sources

```json
[
  "C1191",
  "model/complete_source_row_packet.json"
]
```

## Opened utc

2026-09-28T05:23:38.403467+00:00

## Results

```json
{
  "fibres": {
    "path": "model/ordinary_joint_rounding_fibres.json",
    "sha256": "1cb4a13c33bfabf1020e463c99bd040a92121ec0f3ae9f96e5447592ad059df7",
    "bytes": 14320
  },
  "ordinary_rows": 55,
  "singletons": [
    "MT:Methuselah",
    "MT:Reu",
    "SP:Reu",
    "LXX:Methuselah",
    "LXX:Reu"
  ]
}
```

## Finding

Five of55 ordinary rows have singleton joint fibres: MT/LXX Methuselah, MT/LXX Reu, and SP Reu. This conditional uniqueness comes from two same-sign extreme residuals, not from new source testimony.

## Reassessment

Compare each singleton with the ambiguity when only one rounded component is retained.

## Checks

```json
{
  "55rows": true,
  "excluded3": true,
  "formula_all": true,
  "singletons5": true,
  "source_retained": true
}
```

## Closed utc

2026-09-28T05:23:38.404610+00:00

## Record provenance

Exact record hash: `13b1c5e72ddcd7c70c0a03130ddeccb78d1415aa399749954211836e2f555361`

Source journal: `Research_Cycles/C1132_C1431_Recovered/journal.json`