C809 — Resolve the NT head-role dependence

Question

Would the birth-hinge head produce the same BJ duration?

Inputs

{}

Sources

[
  "File43 Matthew birth-hinge2806 versus envelope2876"
]

Opened utc

2026-09-28T02:09:09.616674+00:00

Results

{
  "birth_head": 2806,
  "envelope_head": 2876,
  "Luke_minus_birth": 2520,
  "Luke_minus_envelope": 2450,
  "role_effect": 70
}

Finding

Using Matthew’s birth head gives2520; its head envelope gives2450. The interface therefore depends on an explicit source role, just as the BJ2450/2400 comparison depends on Creation/Fall roles.

Reassessment

Specify which operations explain the BJ families and which source choices remain inputs.

Checks

{
  "birth2520": true,
  "envelope2450": true
}

Closed utc

2026-09-28T02:09:09.617506+00:00

Record provenance

Exact record hash: 3024e1b427420076a981e30a58b2c49a169b1500efe3af2116d9a23af259804b

Source journal: Research_Cycles/C0732_C0831/journal.json