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    "story_id": "mp-2026-08-19-014",
    "source_story_id": "tmp-story-case-hidden-state-selection",
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    "headline": "The Hidden State Knew When the Vote Was Wrong",
    "slug": "the-hidden-state-knew-when-the-vote-was-wrong",
    "dek": "A leakage-free decodability score predicted when selecting an answer from internal signals would beat majority voting.",
    "summary": "A leakage-free decodability score predicted when selecting an answer from internal signals would beat majority voting.",
    "body_text": "CASE trains a linear gate on answer-token hidden states and chooses the highest-ranked sample. Its decodability measure predicted the gain over voting with a reported correlation of 0.75; across general and medical models, selection improved medium-difficulty accuracy by up to 19 points and hard questions by 16.8 points. A conventional probe looked strong only because question identity leaked across evaluation groups, underscoring that the criterion must itself be tested without leakage.",
    "why_it_matters": "A leakage-free decodability score predicted when selecting an answer from internal signals would beat majority voting.",
    "limitations": [
      "A conventional probe looked strong only because question identity leaked across evaluation groups, underscoring that the criterion must itself be tested without leakage."
    ],
    "importance": 9,
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    "first_published_at": "2026-08-19T09:00:00.000-04:00",
    "modified_at": "2026-08-19T09:00:00.000-04:00",
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        "qualification": "A conventional probe looked strong only because question identity leaked across evaluation groups, underscoring that the criterion must itself be tested without leakage."
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    "source_ids": [
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    "tags": [
      "majority voting",
      "hidden states",
      "decodability",
      "LLM evaluation"
    ],
    "image_url": null,
    "corrections": []
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  "sources": [
    {
      "source_id": "source-2026-08-19-014",
      "title": "arXiv preprint 2608.17124",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2608.17124",
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      "published_at": "2026-08-16T20:00:00.000-04:00",
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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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    "title": "The Hidden State Knew When the Vote Was Wrong",
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    "published_at": "2026-08-19T09:00:00.000-04:00",
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