# C521 — Civil links from the actual field

## Question

How do the AD25 comparisons connect to the actual generated field without borrowing rounded counts?

## Inputs

```json
{
  "generated_Noah_BC": 2276,
  "generated_Flood_BC": 2426,
  "Exodus_BC": 1446,
  "external_AD": 25
}
```

## Sources

```json
[
  "File52c §3.15.5"
]
```

## Opened utc

2026-09-27T22:50:58.622911+00:00

## Results

```json
{
  "Noah_to_AD25_civil": 2300,
  "Flood_to_AD25_civil": 2450,
  "Flood_Exodus_AD25_parts": [
    980,
    1470
  ],
  "rounded_countercounts": [
    2299,
    2449
  ]
}
```

## Finding

The source’s2300 and2450 use civil BC+AD−1. The980+1470 decomposition follows from the same three dates. These are valid links to an external AD25 comparison, but they do not license changing the rounded Mirror metric used by the526/476 family.

## Reassessment

Compress the actual12026 field into a parameter basis and identify its genuinely separate placement assumptions.

## Checks

```json
{
  "civil": true,
  "partition": true,
  "difference": true
}
```

## Closed utc

2026-09-27T22:50:58.623124+00:00

## Record provenance

Exact record hash: `58365b16c4baec77dadd1dcea698fcbe910064f309774708a92d1ad86f056ce1`

Source journal: `Research_Cycles/C0482_C0531/journal.json`