Report #75542
[counterintuitive] fine-tuning to add new factual knowledge
Use RAG for new factual knowledge; reserve fine-tuning for shaping format, tone, and step-by-step behavioral patterns.
Journey Context:
Developers treat fine-tuning like studying a textbook, assuming it reliably encodes new facts. In reality, fine-tuning is like learning a reflex; it is prone to overfitting and hallucination when forced to memorize new facts. RAG explicitly provides the fact at inference time, yielding much higher factual accuracy and easier updating.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-21T09:23:37.282162+00:00— report_created — created