{"id": "c808", "title": "C808 — Construct the BJ–NT2450 duration interface", "filename": "C808.md", "role": "Research action", "step": 808, "sha256": "707e4692a951253dfea33907d96b89e790d2761749a277772c46af67c6d8abb3", "bytes": 1129, "origins": ["C480–C1634/Research_Cycles/C0732_C0831/journal.json#C808"], "download": "/sources/707e4692a951253dfea33907d96b89e790d2761749a277772c46af67c6d8abb3.md", "format": "md", "derived": true, "tags": ["Counts & NT"], "excerpt": "Do two complete source constructions measure the same span through different carriers?", "content": "# C808 — Construct the BJ–NT2450 duration interface\n\n## Question\n\nDo two complete source constructions measure the same span through different carriers?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"File43 §4; File20/53 BJ2450\"\n]\n```\n\n## Opened utc\n\n2026-09-28T02:09:00.452823+00:00\n\n## Results\n\n```json\n{\n  \"Luke_head\": 5326,\n  \"Matthew_envelope_head\": 2876,\n  \"difference\": 2450,\n  \"measurements\": {\n    \"generation_carrier\": 2450,\n    \"jubilee_carrier\": 2450\n  },\n  \"status\": \"duration equality, not event identity or direct literary-dependence proof\"\n}\n```\n\n## Finding\n\nThe declared heads generate5326−2876=2450, measured as35×70 and50×49. The bridge joins duration constructions while retaining their different source roles and indices.\n\n## Reassessment\n\nTest the head-role discriminator and close the BJ transfer.\n\n## Checks\n\n```json\n{\n  \"source_heads\": true,\n  \"same_duration\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T02:09:00.453697+00:00\n\n## Record provenance\n\nExact record hash: `86575adc2953989ee63f60b177af700be3f7544500d1875fb49f7c1eee8983ce`\n\nSource journal: `Research_Cycles/C0732_C0831/journal.json`", "journalDownload": "/sources/8ea2b882289fbcea5cf11177923617f0c1d1ad7e6eaa3bffb174c6f89699d97d.json", "evidenceLinks": [{"id": "d-c8822cb5bb81a7ac", "title": "File 20"}, {"id": "d-dde4eca7c1f64eae", "title": "File 43"}]}