https://www.live-feeds.com/feed/ai-training-of-copyrighted-material-not-fair-use-third-circuitContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/ai-training-of-copyrighted-material-not-fair-use-third-circuithttps://www.live-feeds.com/feed/ai-training-of-copyrighted-material-not-fair-use-third-circuit#u98916Sun, 04 Oct 2026 13:36:21 +0000A United States federal appeals court ruled that training an artificial intelligence system on copyrighted material does not qualify as fair use. The Third Circuit delivered the decision in a copyright lawsuit won by Thomson Reuters against the now-shuttered legal research startup ROSS Intelligence. The appellate panel rejected the fair use defense after ROSS copied Westlaw headnotes to build training data for an artificial intelligence tool designed to answer legal questions. The ruling marks the first time a US appeals court has tested and rejected the fair use defense in the context of arti