Retrieval-Augmented Generation (RAG) combines a language model with external knowledge sources to improve answer accuracy.Surprisingly, providing AI systems with fewer documents often leads to more accurate answers.A study by Hebrew University of Jerusalem researchers found that limiting documents while maintaining total text length improved performance.In a question-answering dataset study, AI models showed up to 10% higher accuracy with fewer relevant documents.RAG systems benefit when given only necessary supporting documents without irrelevant distractions.Too many documents can introduce noise, confusion, and impair AI's ability to extract correct answers.Reducing the number of documents can enhance AI processing efficiency and accuracy simultaneously.Future AI systems should focus on quality rather than quantity when retrieving external knowledge.Improved document filtering and ranking, along with enhancing language models, are key strategies for better AI performance.Optimizing document selection can lead to smarter, leaner, and more efficient AI systems in the future.Smarter retrieval methods are essential as AI systems evolve to handle larger context windows for improved comprehension.