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RAG vs Knowledge Graphs: Two Kinds of AI Memory Lookup

This story is from 2026-10-20. It is preserved in the archive; the latest stories are on the live feed.

Throughout the AI System Design series we follow Mailmind, a fictional AI email assistant that reads an inbox, triages messages, and drafts replies. It is our running example. Before you read: Why RAG Exists: The Context Problem and Embeddings and Vector Search, Demystified . RAG (retrieval-augment…

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  1. 2026-10-20 13:00 · DEV Community — AI
    RAG vs Knowledge Graphs: Two Kinds of AI Memory Lookup

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