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Anthropic let Claude agents trade books for 201 of its staff after a five-minute chat, and says the agents guessed people's tastes right on 61% of book pairs. True, and Anthropic says what the summaries skip: a coin flip scores 50%.

Anthropic ('Project Swap' research post), amplified by TLDR AI. Recorded 26 September 2026. Our ruling means: we tried to break it and could not.

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Receipts pack

The evidence file for this verdict

25 receipts: 4 support the claim, 0 contradict it, 21 add context. 4 figures on the record, 4 traced to a quoted receipt.

  1. 1anthropic.com ↗Every source link and quote stays open on the story page.
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What each receipt proves, and what would change our mind.

  • Every receipt with its source, date and stance, plus what it proves
  • The figures table, each number traced to the receipt that states it
  • What would change our verdict
  • Our call on the record, with its due date

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