# C654 — Reconstruct the secondary30/40 junction

## Question

Which equation generates the source’s30|30|40|40 arrangement?

## Inputs

```json
{
  "H": 1929,
  "D": 1859,
  "a": 30,
  "b": 40,
  "source_path": [
    1959,
    1929,
    1899,
    1859,
    1819
  ]
}
```

## Sources

```json
[
  "File70 §5.4; secondary schematic comparison"
]
```

## Opened utc

2026-09-28T01:06:20.396425+00:00

## Results

```json
{
  "path": [
    1959,
    1929,
    1899,
    1859,
    1819
  ],
  "junction_from_below": 1899,
  "gaps": [
    30,
    30,
    40,
    40
  ],
  "whole": 140
}
```

## Finding

The shared1899 junction follows exactly from H−D=a+b=70. The whole path then has width2(a+b)=140. Its schematic30-day premise supplies the junction; choosing29 would give1900 instead.

## Reassessment

Reconstruct Joseph’s complete supplied age rail and determine what is retained from Creation.

## Checks

```json
{
  "source_path": true,
  "junction": true,
  "dependency": true
}
```

## Closed utc

2026-09-28T01:06:20.396626+00:00

## Record provenance

Exact record hash: `14c2e962db65235ffc3310e40dbdab2dd2684788aed34f81121ae669703b86b4`

Source journal: `Research_Cycles/C0632_C0731/journal.json`