{"id": "c850", "title": "C850 — Freeze the full paired-anchor inverse field", "filename": "C850.md", "role": "Research action", "step": 850, "sha256": "7d66e79f8da6eedf4c31f23b5c39e0e6d28ab10734a56ea1d5dc75bb2aca92a6", "bytes": 1264, "origins": ["C480–C1634/Research_Cycles/C0832_C0931/journal.json#C850"], "download": "/sources/7d66e79f8da6eedf4c31f23b5c39e0e6d28ab10734a56ea1d5dc75bb2aca92a6.md", "format": "md", "derived": true, "tags": ["Inverse"], "excerpt": "Can one digit-register rule explain every existing pair of File52c endpoints?", "content": "# C850 — Freeze the full paired-anchor inverse field\n\n## Question\n\nCan one digit-register rule explain every existing pair of File52c endpoints?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"latest File52c §2.1 and AppendixA.2–A.3; inverse preparation audit\"\n]\n```\n\n## Opened utc\n\n2026-09-28T02:35:14.463028+00:00\n\n## Results\n\n```json\n{\n  \"packet\": {\n    \"path\": \"model/inverse_inputs.json\",\n    \"sha256\": \"dbcb35bf6cfe88b318b4c8c327e97aa0be06583d5e945c43c9aac8b7f7b80911\",\n    \"bytes\": 19844\n  },\n  \"scope\": \"existing32 sources and64 endpoints; target columns excluded; original input durations only\",\n  \"hypothesis\": \"anchor dependence is generated by decimal borrow, core length and retained zero-placeholders\"\n}\n```\n\n## Finding\n\nThe entire original paired field is the next fixed reconstruction target. No extra dates, target counts, or second-pass reversal are admitted.\n\n## Reassessment\n\nClose the first20-step checkpoint, then test the paired field.\n\n## Checks\n\n```json\n{\n  \"packet_present\": true,\n  \"known_primary\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T02:35:14.464217+00:00\n\n## Record provenance\n\nExact record hash: `ea0de96319b30884989dd06a7e3b87c647f519f5e14c49394d0857ebd59eb8dc`\n\nSource journal: `Research_Cycles/C0832_C0931/journal.json`", "journalDownload": "/sources/6a37be4e218f9f467cbde5e9db3723ce9c79dc78cc97d1a289422b96cb9971e0.json", "evidenceLinks": [{"id": "d-dbcb35bf6cfe88b3", "title": "model/inverse_inputs.json"}, {"id": "file52c", "title": "File 52c"}]}