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  "retrievedAt": "2026-07-16T18:20:39.515Z",
  "createdAt": "2026-05-04T19:28:20.436Z",
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    "text": "The claim that short-term experiments provide conservative lower-bound estimates of long-term effects is contradicted by the 2023 Meta experiments, which found null effects over a three-month window."
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      "text": "A three-month randomized experiment replacing algorithmic with chronological feeds found no detectable polarization effect.",
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