{
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    "economic_signal_ids": [],
    "relation": "topic-surface-only",
    "scan_signal_ids": []
  },
  "dek": "No matter how thoroughly you brush your teeth in the morning and evening, the battle against bacteria is almost certain to be lost. Within a few hours of brushing, it will return in force and rebuild a solid defence line on the surface of your teeth. From ancient times to now, humanity has essentially had only one way",
  "desk": "politics",
  "event_id": "event-3c1843d048139cadddfc0fe1",
  "evidence_groups": [
    {
      "group_id": "south-china-morning-post-editorial",
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        "scmp-china"
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      "independence_group": "south-china-morning-post-editorial",
      "item_id": "item-3fbb69cc6c0ab4b63d992ab5",
      "published_at": "2026-11-04T19:00:08Z",
      "role": "media",
      "source_id": "scmp-china",
      "source_name": "South China Morning Post — China",
      "title": "Chinese scientists make a toothbrush that uses mild electric shocks to reduce plaque",
      "url": "https://www.scmp.com/news/china/science/article/3373278/chinese-scientists-make-toothbrush-uses-mild-electric-shocks-reduce-plaque",
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  "evidence_strength": "single-source",
  "headline": "Chinese scientists make a toothbrush that uses mild electric shocks to reduce plaque",
  "lead": false,
  "lead_reason": "Current single-source metadata is retained but not promoted as a lead.",
  "limitations": [
    "Palimpsest retained only feed title, canonical link, time, and a bounded plain-text excerpt; it did not fetch the article body.",
    "The evidence-strength label describes source structure, not truth, intent, impact, or causation.",
    "Declared instrument links are topical pointers until a separate scan or economic observation is joined by time and method.",
    "Title-similarity clustering can miss differently worded or cross-language accounts and can join closely worded updates.",
    "This dossier currently contains one independent evidence group and remains explicitly attributed."
  ],
  "mutation": {
    "kind": "unchanged",
    "previous_version_id": "eventv-310a10133f2f5f123fa06046"
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  "published_at": "2026-11-04T19:00:08Z",
  "reported_facts": [
    {
      "attribution": "South China Morning Post — China",
      "evidence_item_id": "item-3fbb69cc6c0ab4b63d992ab5",
      "published_at": "2026-11-04T19:00:08Z",
      "statement": "South China Morning Post — China published “Chinese scientists make a toothbrush that uses mild electric shocks to reduce plaque”."
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  "topics": [
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  "updated_at": "2026-11-04T19:00:08Z",
  "url": "https://palimpsest.info/news/wire/event-3c1843d048139cadddfc0fe1/",
  "version_id": "eventv-310a10133f2f5f123fa06046"
}