# C1052 — The clutch’s first landing is definitional

## Question

What does the maximum-envelope subtraction actually determine?

## Inputs

```json
{
  "Exodus": 1446
}
```

## Sources

```json
[
  "File61 §6",
  "C1051"
]
```

## Opened utc

2026-09-28T04:06:43.737178+00:00

## Results

```json
{
  "maximum_envelope": 487,
  "regular_span": 473,
  "derived_clutch": 14,
  "identity": "d = cumulative_Kohath − regular_Levi_death",
  "first_landing": 1782
}
```

## Finding

The Exodus anchor cancels from the envelope subtraction. It defines d as cumulative Kohath minus regular Levi death, so that first landing is forced by construction.

## Reassessment

Check what additional information the adjacent Levi-birth landing requires.

## Checks

```json
{
  "envelope_difference": true,
  "identity": true,
  "forced_landing": true
}
```

## Closed utc

2026-09-28T04:06:43.737854+00:00

## Record provenance

Exact record hash: `0962528bb8187e3dedadb26a099cecacc5a127a1c0569996cbe85ed004184a62`

Source journal: `Research_Cycles/C0932_C1131/journal.json`