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A document is not a fact. It is a claim. After four months of shipping an AI sales rep, I think the next infra layer is belief-based knowledge systems. Here is the buildup, with one running example, six diagrams, and the papers behind it.

Building and optimizing a RAG system for Level 1 factual recall—from 12/30 to 27/30 through iterative improvements in chunking, retrieval, and evaluation.

Kick off the RAG Through Wonderland series by defining AliceEval and outlining the five-level journey from factual recall to external knowledge synthesis.

A practical guide to RAG—what it is, why it matters, benefits, how it works, and trade-offs.