US Third Circuit puts competition at center of ROSS AI training ruling
By Melissa Ritti and Nick Robertson ( September 30, 2026, 21:23 GMT | Insight) -- Thomson Reuters’ infringement claim against ROSS Intelligence is “no more than an ordinary copyright case” despite its artificial intelligence component, the US Court of Appeals for the Third Circuit said Wednesday. The panel affirmed that Westlaw headnotes are copyrightable and that ROSS’s use of them was not fair, while distinguishing the clash from disputes involving generative AI.The US Court of Appeals for the Third Circuit released its full opinion Wednesday in an interlocutory appeal by ROSS Intelligence of a partial summary judgment that its reliance on Thomson Reuters’ materials to train a competing legal research tool was not a fair use....
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