
First Legal Ruling on AI, Copyright, and Training Data Goes the Way of Creators
This case will be cited in future legal arguments.

Creators win against AI companies. Training on copyrighted data is not fair use.
Ross was an artificial intelligence (AI) startup that Thomson Reuters sued in 2020 after it attempted to build a legal search engine using data from Thomson Reuter’s legal search engine, Westlaw. Judge Bibas writes in his decision that “none of Ross’s possible defenses holds water” against copyright infringement accusations. He dismissed Ross’s fair use defense, emphasizing how Ross’s use of copyrighted material directly impacted the original work’s market value by creating a direct competitor.