It’s been determined that training on lawfully acquired works is fair use. Presumably in this discussion of shredding physical books Dario and Sam are not pulling heists at the local library.

I’m sure there’s ongoing litigation, and better sources than this, but fair use was determined in June 2025 in a sf federal district court https://www.goodwinlaw.com/en/insights/publications/2025/06/...

Similar conclusion vs meta https://www.jw.com/news/insights-kadrey-meta-bartz-anthropic...

And the more recent $1.5B settlement did not overturn it https://www.reuters.com/world/us-judge-approves-anthropics-1...

It's not copying (and hence not stealing) if you destroy the original book. That is where copyright law has brought us

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