The Mind-Blowing Truth About RAG: It’s Just 260-Year-Old Math (And Why That Changes Everything) 🤯
Last Updated on November 13, 2025 by Editorial Team
Author(s): MahendraMedapati
Originally published on Towards AI.
How AI Giants Accidentally Rediscovered Thomas Bayes’ 1763 Theorem and Called It Innovation
Hey there, fellow tech enthusiast! 👋

The article explores the connection between modern RAG (Retrieval-Augmented Generation) systems and the historical mathematical method of Bayesian inference established by Thomas Bayes in 1763. It highlights that AI tools, which seem cutting-edge, are fundamentally rooted in Bayes’ theorem, redefining our understanding of AI’s capabilities. Through various practical examples, the author illustrates how both the prior knowledge and the retrieval evidence play crucial roles in these systems. By analyzing potential pitfalls and improvements in RAG frameworks, the article emphasizes that enhancing the foundational elements can lead to more reliable and intelligent AI applications. The discussion culminates in a reflection on the philosophical implications of using mathematical principles in AI, urging readers to appreciate the depth of knowledge that underpins modern technology.
Read the full blog for free on Medium.
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