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    "story_id": "mp-2026-10-04-004",
    "source_story_id": "tmp-story-root-cause-on-policy-distillation",
    "edition_id": "mp-2026-10-04-morning-0087",
    "edition_url": "https://themachinepress.com/edition/2026-10-04",
    "position": 4,
    "story_type": "dispatch",
    "section": "research",
    "editorial_classification": "editorial",
    "headline": "The Teacher Repaired the Student’s First Wrong Turn",
    "slug": "the-teacher-repaired-the-student-s-first-wrong-turn",
    "dek": "RC-OPD uses local repairs of a model’s own failed reasoning instead of handing it an unrelated correct solution.",
    "summary": "RC-OPD uses local repairs of a model’s own failed reasoning instead of handing it an unrelated correct solution.",
    "body_text": "Reference-based distillation can teach a correct conclusion without fixing the mistake that produced a student’s failure. RC-OPD locates the earliest substantive error, builds a local correction and tests whether the student can continue from the repaired point. Successful repair chains supervise flawed segments while preserving valid progress. The preprint reports improvements across multiple datasets and model scales, but its abstract does not supply a single aggregate gain; the contribution is the tested diagnosis-and-repair procedure.",
    "why_it_matters": "RC-OPD uses local repairs of a model’s own failed reasoning instead of handing it an unrelated correct solution.",
    "limitations": [
      "The preprint reports improvements across multiple datasets and model scales, but its abstract does not supply a single aggregate gain; the contribution is the tested diagnosis-and-repair procedure."
    ],
    "importance": 8,
    "canonical_url": "https://themachinepress.com/story/mp-2026-10-04-004/the-teacher-repaired-the-student-s-first-wrong-turn",
    "json_url": "https://themachinepress.com/story/mp-2026-10-04-004.json",
    "first_published_at": "2026-10-04T09:00:00.000-04:00",
    "modified_at": "2026-10-05T08:46:40.372-04:00",
    "content_status": "updated",
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    "carryover_reason": null,
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        "text": "RC-OPD uses local repairs of a model’s own failed reasoning instead of handing it an unrelated correct solution.",
        "source_ids": [
          "source-2026-10-04-004"
        ],
        "qualification": "The preprint reports improvements across multiple datasets and model scales, but its abstract does not supply a single aggregate gain; the contribution is the tested diagnosis-and-repair procedure."
      }
    ],
    "source_ids": [
      "source-2026-10-04-004"
    ],
    "tags": [
      "reasoning",
      "on-policy distillation",
      "error repair"
    ],
    "image_url": null,
    "corrections": [
      {
        "correction_id": "correction-2026-10-04-001",
        "revision": 2,
        "summary": "Publication note: This October 4 edition was reconstructed on October 5 after the workstation was offline. It uses original October 2 submissions from the standard Sunday-evening arXiv release, rather than claiming those papers were available for the missed 9 AM run. The date and 9 AM publication slot preserve archive chronology; October 5 developments are excluded. The September 27 Invention Desk is carried over because its replacement was generated October 5.",
        "published_at": "2026-10-05T08:46:40.372-04:00",
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        "affected_claim_ids": []
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  "sources": [
    {
      "source_id": "source-2026-10-04-004",
      "title": "arXiv preprint 2610.03515, original v1",
      "publisher": "arXiv / submitting research authors",
      "url": "https://arxiv.org/abs/2610.03515v1",
      "canonical_url": "https://arxiv.org/abs/2610.03515v1",
      "source_type": "primary_research",
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      "published_at": "2026-10-02T12:07:39.000-04:00",
      "accessed_at": "2026-10-05T08:32:10.013-04:00",
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  ],
  "corrections": [
    {
      "correction_id": "correction-2026-10-04-001",
      "revision": 2,
      "summary": "Publication note: This October 4 edition was reconstructed on October 5 after the workstation was offline. It uses original October 2 submissions from the standard Sunday-evening arXiv release, rather than claiming those papers were available for the missed 9 AM run. The date and 9 AM publication slot preserve archive chronology; October 5 developments are excluded. The September 27 Invention Desk is carried over because its replacement was generated October 5.",
      "published_at": "2026-10-05T08:46:40.372-04:00",
      "affected_story_ids": [],
      "affected_claim_ids": []
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  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
  },
  "cite_this_report": {
    "title": "The Teacher Repaired the Student’s First Wrong Turn",
    "publisher": "The Machine Press",
    "published_at": "2026-10-04T09:00:00.000-04:00",
    "canonical_url": "https://themachinepress.com/story/mp-2026-10-04-004/the-teacher-repaired-the-student-s-first-wrong-turn"
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