Stop GPT Hallucinations With an I Don't Know Escape

Because LLMs predict likely continuations probabilistically, they fill context gaps with generic plausible answers unless instructed otherwise. Explicitly allow the model to say "I don't know" when information is missing from the provided context.

Answer the research question using only the provided <source_material>. If information required to answer is missing from <source_material>, state "I don't know — information missing from provided sources" instead of guessing.