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.

While the startup has won its “fair use” argument, it potentially faces billions of dollars in damages for allegedly pirating over 7 million books to build a digital library.