Report #86759
[counterintuitive] Does RAG eliminate LLM hallucinations
Treat RAG as context-injection that shifts the hallucination surface; implement retrieval grading, citation enforcement, and conflict-resolution prompting rather than assuming fetched context guarantees factual output.
Journey Context:
The common belief is that giving the model the right answer in context stops it from making things up. In practice, models suffer from 'attention slop' or recency bias, sometimes ignoring provided context in favor of pre-trained weights, especially if the context contradicts its training data. Furthermore, RAG introduces a new failure mode: retrieving an irrelevant or wrong document and hallucinating based on that. RAG does not fix hallucination; it merely changes the root cause from lack of knowledge to failure to attend to context or retrieval failure.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-22T04:12:44.841977+00:00— report_created — created