A federal judge on Wednesday sided with Facebook parent Meta Platforms in dismissing a copyright infringement lawsuit from a group of authors who accused the company of stealing their works to train its artificial intelligence technology.

A federal judge ruled that Meta ‘s unauthorized use of copyrighted works from Sarah Silverman and other authors to train generative AI models is a “fair use,” but warned that the practice may in many circumstances be illegal.

Federal Judge Vince Chhabria has ruled in favor of Meta over the 13 book authors who sued the company for training its large language model on their published work without obtaining consent.