{"id": "c616", "title": "C616 — Assess explanatory coverage and necessary distinctions", "filename": "C616.md", "role": "Research action", "step": 616, "sha256": "c53a029b76bfe2ff86cb91f5adab1254cd791139240e404da537a226a3d72749", "bytes": 1256, "origins": ["C480–C1634/Research_Cycles/C0532_C0631/journal.json#C616"], "download": "/sources/c53a029b76bfe2ff86cb91f5adab1254cd791139240e404da537a226a3d72749.md", "format": "md", "derived": true, "tags": [], "excerpt": "What has the candidate grammar explained, and which simpler alternatives failed?", "content": "# C616 — Assess explanatory coverage and necessary distinctions\n\n## Question\n\nWhat has the candidate grammar explained, and which simpler alternatives failed?\n\n## Inputs\n\n```json\n{\n  \"covered_step_range\": [\n    532,\n    615\n  ]\n}\n```\n\n## Sources\n\n```json\n[\n  \"Completed journal and source reviews\"\n]\n```\n\n## Opened utc\n\n2026-09-28T00:32:07.805318+00:00\n\n## Results\n\n```json\n{\n  \"artifact\": {\n    \"path\": \"model/coverage_and_counterexamples.json\",\n    \"sha256\": \"ecc4a3a750236fe5ac7f5e9996183960363264d45cea7cac04a7095946904604\",\n    \"bytes\": 1500\n  },\n  \"covered_families\": 9,\n  \"diagnostic_counterexamples\": 5,\n  \"statistical_ledger_change\": 0\n}\n```\n\n## Finding\n\nThe model explains complete families and records concrete failures of simpler date-only alternatives. Coverage counts describe reconstruction, not independent support; no target tally is enlarged.\n\n## Reassessment\n\nReconcile all completed review clarifications before drafting the main explanation.\n\n## Checks\n\n```json\n{\n  \"scope\": true,\n  \"no_tally_extension\": true\n}\n```\n\n## Closed utc\n\n2026-09-28T00:32:07.805755+00:00\n\n## Record provenance\n\nExact record hash: `4a4cf820c117a71bb916354d2c86ab6ffc491b497acd1d20b555cd8769f7eccf`\n\nSource journal: `Research_Cycles/C0532_C0631/journal.json`", "journalDownload": "/sources/7a2e1117efc741218b68e2db8bb20eadd33cab34e00384e9b903708031da1d2d.json", "evidenceLinks": [{"id": "d-ecc4a3a750236fe5", "title": "model/coverage_and_counterexamples.json"}]}