Angelina YangFounder and Host, TwoSetAI · AI builder for visibility and discoverability

Source says 90%. AI says 85%. RAG says "match."

24 Sept 2026 · 0 min

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In this brief commentary, Angelina Yang highlights a potential pitfall in retrieval‑augmented generation (RAG) systems. She notes that the source material reports that 90% of proof‑of‑concepts (POCs) fail in production, while her AI‑generated answer states an 85% failure rate. Although the numbers differ, a RAG system might still deem the two statements a "match" because the surrounding wording is largely identical. This illustrates how RAG matching based on lexical overlap can mask substantive mismatches, leading to false confidence in the retrieved answer.

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