Two federal judges in California have already tackled whether training AI on copyrighted work is fair use, and they didn't fully agree. On Wednesday, US District Judge Eumi Lee in San Jose hears from Anthropic and the music publishers suing it in a case that could shape the answer.

In 2023, Universal Music Group (UMG), Concord, and Allen & Betty Klein and Company (ABKCO) filed a lawsuit against Anthropic for copyright infringement by using the lyrics to train Claude in hundreds of songs........

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