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Landmark ‘Fair Use’ Ruling in Thompson Reuters AI Copyright Case

A district judge has ruled that, as a matter of law, Ross Intelligence’s use of Thompson Reuters’ Westlaw content to train its own legal research model is not “fair use” but copyright infringement. This is a revision of a 2023 ruling and leaves issues for a jury to decide. It might, however, shut down one line of defense when it comes to AI scraping of copyright material.