Late last month, Elon Musk launched Grokipedia, an AI-generated encyclopedia with 855,279 articles, no human editors, and no way for users to request improvements beyond a suggestion box addressed to its eponymous chatbot author. The tech entrepreneur is eager, he has said, to “purge out the propaganda” that he argues afflicts Wikipedia, the venerable user-generated reference source. But some Grokipedia articles are near replicas of Wikipedia entries. Other articles in the new source seem