• A judge allowed a class-action lawsuit from authors to move forward against OpenAI and Microsoft. • He pointed to a ChatGPT-generated book idea for George R.R. Martin's "A Song of Ice and Fire" series. • The judge hasn't decided whether OpenAI is protected by "fair use," which set back a similar case.

When a federal judge decided to allow a sprawling class-action lawsuit against OpenAI to move forward, he read some "Game of Thrones" fan fiction.

In a court ruling Monday, US District Judge Sidney Stein said a ChatGPT-generated idea for a book in the still-unfinished "A Song of Ice and Fire" series by George R.R. Martin could have violated the author's copyright.

"A reasonable jury could find that the allegedly infringing outputs are substantially similar to plaintiffs' works," the

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