According to God of Prompt on X, MIT researchers identified “context pollution,” where large language models degrade when they read their own prior outputs, causing errors, hallucinations, and stylistic artifacts to propagate because the model implicitly treats its earlier responses as ground truth; removing that chat history restores performance. As reported by the original X post, this finding highlights immediate product risks for multi-turn assistants, autonomous agents, and RAG chat systems that append full transcripts. According to the post, teams can mitigate by truncating history, re-summarizing with citations, and re-querying source-grounded context per turn—practical steps that can cut compounding hallucinations and reduce support costs while improving answer precision in enterprise chat and customer service flows.