When they hallucinate, they don’t do it consistently, so one option is running the same query through multiple times (with different “expert” base prompts), or through different LLMs and then rejecting it as “I don’t know” if there’s too much disagreement between them. The Q* approach is similar, but baked in. This should dramatically reduce hallucinations.

Edit: added bit about different experts

You may not have discovered TVP yet. You should do so.