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Perplexity, an AI-powered search platform, is facing a lawsuit from newspaper publishers, including the Chicago Tribune, over alleged copyright infringement. The core of the legal challenge revolves around Perplexity’s use of Retrieval Augmented Generation (RAG) technology, which publishers claim leverages their copyrighted content without proper authorization. This legal action highlights the intensifying debate surrounding the fair use of news content by AI developers and the potential impact on the news industry’s revenue streams.