{"id": "c794", "title": "C794 — Reconstruct the BJ deletion path", "filename": "C794.md", "role": "Research action", "step": 794, "sha256": "558c8b165c430828f9bd5a8e462bc48dab8c4b8fee1c990c8453af749c147829", "bytes": 1353, "origins": ["C480–C1634/Research_Cycles/C0732_C0831/journal.json#C794"], "download": "/sources/558c8b165c430828f9bd5a8e462bc48dab8c4b8fee1c990c8453af749c147829.md", "format": "md", "derived": true, "tags": ["Regular", "Cumulative"], "excerpt": "Does deleting the57-year edge preserve the supplied upstream and downstream relations?", "content": "# C794 — Reconstruct the BJ deletion path\n\n## Question\n\nDoes deleting the57-year edge preserve the supplied upstream and downstream relations?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"File53 §3A.1–2\"\n]\n```\n\n## Opened utc\n\n2026-09-28T02:05:40.026931+00:00\n\n## Results\n\n```json\n{\n  \"path\": {\n    \"path\": \"model/BJ_deletion_path.json\",\n    \"sha256\": \"e724d12a5afe6f818d3879aa1924d52ca261ca78492ca2b7b2c36da6986058ba\",\n    \"bytes\": 267\n  },\n  \"original\": [\n    3856,\n    2549,\n    2482,\n    2425\n  ],\n  \"secondary_expunged\": [\n    3799,\n    2492,\n    2425\n  ],\n  \"original_gaps\": [\n    1307,\n    67,\n    57\n  ],\n  \"expunged_gaps\": [\n    1307,\n    67\n  ],\n  \"total_before_after\": [\n    1431,\n    1374\n  ]\n}\n```\n\n## Finding\n\nThe secondary contraction removes57 while holding Shelah fixed and shifting both upstream Creation and Flood by57. The1307 Creation–Flood interval is retained as inherited source structure.\n\n## Reassessment\n\nCompare the index and duration weights across BJ, regular, and cumulative Cainan operations.\n\n## Checks\n\n```json\n{\n  \"preserved_1307\": true,\n  \"removed57\": true,\n  \"remaining67\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T02:05:40.028395+00:00\n\n## Record provenance\n\nExact record hash: `6ec8800b4b37597486141751fd8d1608ff840d7723bf1c2c379c34051f02144c`\n\nSource journal: `Research_Cycles/C0732_C0831/journal.json`", "journalDownload": "/sources/8ea2b882289fbcea5cf11177923617f0c1d1ad7e6eaa3bffb174c6f89699d97d.json", "evidenceLinks": [{"id": "d-e724d12a5afe6f81", "title": "model/BJ_deletion_path.json"}, {"id": "d-9f0e41022cab59a4", "title": "File 53"}]}