The legal profession has entered a new frontier in the intersection of artificial intelligence and copyright law. On Feb. 11, 2025, the U.S. District Court for the District of Delaware issued a landmark decision in Thomson Reuters Enterprise Centre GmbH v Ross Intelligence Inc, No 1:20-cv-613-SB, ruling in favour of Thomson Reuters in the first major fair use copyright case involving AI. The decision, which found that ROSS Intelligence unlawfully used Thomson Reuters’ Westlaw headnotes to train its legal AI research tool, raises profound questions about the future of AI training, data access, and copyright law.