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    "story_id": "mp-2026-11-06-011",
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    "edition_id": "mp-2026-11-06-morning-0119",
    "edition_url": "https://themachinepress.com/edition/2026-11-06",
    "position": 11,
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    "headline": "Reasoning Restarts at the First Suspected Error",
    "slug": "reasoning-restarts-at-the-first-suspected-error",
    "dek": "StepBack localizes a likely first mistake, then resamples only that step and the suffix rather than whole reasoning traces.",
    "summary": "StepBack localizes a likely first mistake, then resamples only that step and the suffix rather than whole reasoning traces.",
    "body_text": "The method begins with a small set of draft trajectories, uses lightweight signals to find likely first-error positions and votes across corrected suffixes. Across seven math-reasoning and multi-hop question-answering benchmarks, the authors report average accuracy matching self-consistency while using up to 41.26 percent fewer tokens. It can also be combined with adaptive-consistency methods. The savings depend on the tested tasks and localization signals.",
    "why_it_matters": "StepBack localizes a likely first mistake, then resamples only that step and the suffix rather than whole reasoning traces.",
    "limitations": [],
    "importance": 8,
    "canonical_url": "https://themachinepress.com/story/mp-2026-11-06-011/reasoning-restarts-at-the-first-suspected-error",
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    "first_published_at": "2026-11-06T09:00:00.000-05:00",
    "modified_at": "2026-11-06T09:00:00.000-05:00",
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        "qualification": null
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    "source_ids": [
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    "tags": [
      "test-time reasoning",
      "error localization",
      "token efficiency"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-11-06-011",
      "title": "arXiv preprint 2611.08403, original v1",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2611.08403v1",
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      "published_at": "2026-11-05T13:12:49.000-05:00",
      "accessed_at": "2026-11-06T08:21:03.209-05:00",
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  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "Reasoning Restarts at the First Suspected Error",
    "publisher": "The Machine Press",
    "published_at": "2026-11-06T09:00:00.000-05:00",
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