{"id": "c870", "title": "C870 — Recover the full reflection of the primary display", "filename": "C870.md", "role": "Research action", "step": 870, "sha256": "ec275e003e9dc9c6e4e808f788ecc20f2f521ed498c3975629bb2aee42af7a4f", "bytes": 1373, "origins": ["C480–C1634/Research_Cycles/C0832_C0931/journal.json#C870"], "download": "/sources/ec275e003e9dc9c6e4e808f788ecc20f2f521ed498c3975629bb2aee42af7a4f.md", "format": "md", "derived": true, "tags": [], "excerpt": "Which part of the chiasm is automatic grid closure and which part is supplied placement?", "content": "# C870 — Recover the full reflection of the primary display\n\n## Question\n\nWhich part of the chiasm is automatic grid closure and which part is supplied placement?\n\n## Inputs\n\n```json\n{}\n```\n\n## Sources\n\n```json\n[\n  \"File54 primary chiasm\",\n  \"C860,869\"\n]\n```\n\n## Opened utc\n\n2026-09-28T02:45:22.686686+00:00\n\n## Results\n\n```json\n{\n  \"reflection\": {\n    \"path\": \"model/NT_primary_reflection.json\",\n    \"sha256\": \"f8d0f90c2df70d00c1860bba662e5b44f509ff956993a095f01ee1e9e0e1a460\",\n    \"bytes\": 6988\n  },\n  \"marked\": {\n    \"outer_pair\": [\n      -5325,\n      65\n    ],\n    \"BJ_pair\": [\n      -3855,\n      -1405\n    ],\n    \"center_civil\": -2630,\n    \"center_BC\": 2631\n  }\n}\n```\n\n## Finding\n\nReflection x→−5260−x closes the entire primary grid and sends coarse indexm to11−m. Closure follows from uniform spacing; the placement of BJ Creation and Conquest at swapped indices21 and56 is the supplied structural fact.\n\n## Reassessment\n\nCheckpoint the completed NT transfer, then test Key domains beyond the homogeneous display.\n\n## Checks\n\n```json\n{\n  \"full_closure\": true,\n  \"coarse_closure\": true,\n  \"marked_pair\": true,\n  \"center_between\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T02:45:22.687340+00:00\n\n## Record provenance\n\nExact record hash: `c5ecb28c7d72d1ad6512bb04a55589e9abdb6197051c16431c18164ba5199f4c`\n\nSource journal: `Research_Cycles/C0832_C0931/journal.json`", "journalDownload": "/sources/6a37be4e218f9f467cbde5e9db3723ce9c79dc78cc97d1a289422b96cb9971e0.json", "evidenceLinks": [{"id": "d-f8d0f90c2df70d00", "title": "model/NT_primary_reflection.json"}, {"id": "d-1ff1914fa180de2a", "title": "File 54"}]}