# C779 — Build the Terah source triangle

## Question

Can the same regular+60 have distinct cumulative meanings?

## Inputs

```json
{}
```

## Sources

```json
[
  "File18 §§3.2.2,6A,6C"
]
```

## Opened utc

2026-09-28T02:01:25.817782+00:00

## Results

```json
{
  "triangle": {
    "path": "model/Terah_triangle.json",
    "sha256": "f5792e3ef1a0018a7ea9e91582ec3697efb813685b26b6dd93d7c7a23d5c9a4a",
    "bytes": 450
  },
  "states": {
    "SP_textual": {
      "b": 70,
      "r": 75,
      "L": 145,
      "regular_head": 2021,
      "regular_death": 1876,
      "cumulative_head": 2580
    },
    "MT_LXX_baseline": {
      "b": 70,
      "r": 135,
      "L": 205,
      "regular_head": 2021,
      "regular_death": 1816,
      "cumulative_head": 2640
    },
    "common_alternative": {
      "b": 130,
      "r": 75,
      "L": 205,
      "regular_head": 2081,
      "regular_death": 1876,
      "cumulative_head": 2640
    }
  },
  "status": "SP textual145 and MT/LXX205 literal; SP common130/205 biography is a compatible derived construction, not official cumulative replacement"
}
```

## Finding

SP textual, MT/LXX baseline, and the common alternative form one row triangle. Their regular and cumulative projections distinguish which component changed.

## Reassessment

Test path independence around the triangle in both projections.

## Checks

```json
{
  "lifespans": true,
  "heads": true
}
```

## Closed utc

2026-09-28T02:01:25.818320+00:00

## Record provenance

Exact record hash: `5c17b85b18a62cd3e639f3ccfbd554d754e88724864f1ccadbc5998f1bd47703`

Source journal: `Research_Cycles/C0732_C0831/journal.json`