# C1201 — Write the joint Rounded-row explanatory bridge

## Question

What does joint recovery add to the family picture?

## Inputs

```json
{}
```

## Sources

```json
[
  "C1190–C1200",
  "C1189"
]
```

## Opened utc

2026-09-28T05:25:05.245793+00:00

## Results

```json
{
  "explanation": {
    "path": "deliverables/Joint_Rounded_Row_Information.md",
    "sha256": "f582659b5226cb2d9115eaaa9d572eff7f17c63c37f2e3cd4d8d088500a669fa",
    "bytes": 1863
  }
}
```

## Finding

Joint Rounded observations now have a concrete information account: bounded residual fibres explain both conditional recovery and the local carry between different rounded constructions.

## Reassessment

Derive the composite cap-plus-round fibre with source capacities held.

## Checks

```json
{
  "source_dependency": true,
  "SP_scope": true,
  "main753": true
}
```

## Closed utc

2026-09-28T05:25:05.246201+00:00

## Record provenance

Exact record hash: `10515ce8af816561f078cc29a980782be0b598824fbba16e670f9204ffb4b126`

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