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    "story_id": "mp-2026-09-05-026",
    "source_story_id": "tmp-story-provenance-density-interface",
    "edition_id": "mp-2026-09-05-morning-0058",
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    "section": "media-creative-tools",
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    "headline": "A Label Said AI. The Evidence Map Said Whether to Believe It",
    "slug": "a-label-said-ai-the-evidence-map-said-whether-to-believe-it",
    "dek": "An idealized provenance-density display separated true from fabricated passages by 4.15 rating points in an 81-person study.",
    "summary": "An idealized provenance-density display separated true from fabricated passages by 4.15 rating points in an 81-person study.",
    "body_text": "Instead of a binary authorship badge, Provenance Density visualizes how much verified support sits behind a passage. Participants shown the idealized interface produced a large truth-versus-fabrication discernment gap, while the no-signal group showed no detectable separation. A 200-sample technical audit also found that retrieval density alone was insufficient; a consistency veto supplied most of the discriminative signal on dynamic questions. The authors argue for evidence visualization over authorship labeling, but the user study tested a designed interface rather than a deployed fact-checking system.",
    "why_it_matters": "An idealized provenance-density display separated true from fabricated passages by 4.15 rating points in an 81-person study.",
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    "importance": 8,
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    "tags": [
      "provenance",
      "AI transparency",
      "evidence interfaces"
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    "corrections": []
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  "sources": [
    {
      "source_id": "source-2026-09-05-015",
      "title": "arXiv preprint 2609.03460",
      "publisher": "arXiv",
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      "published_at": "2026-09-03T03:18:42.000-04:00",
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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": "A Label Said AI. The Evidence Map Said Whether to Believe It",
    "publisher": "The Machine Press",
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