A judge’s decision that Anthropic‘s use of copyrighted books to train its AI models is a “fair use” is likely only the start of lengthy litigation to resolve one of the most hotly contested questions over the latest tech revolution.

In a test case for the artificial intelligence industry, a federal judge has ruled that AI company Anthropic didn’t break the law by training its chatbot Claude on millions of copyrighted books.

A federal judge in San Francisco ruled late on Monday that Anthropic's use of books without permission to train its artificial intelligence system was legal under U.S. copyright law. Siding with tech companies on a pivotal question for the AI industry,