You can 100% do this. We do that at my startup (https://emergingtrajectories.com/ https://emergingtrajectories.com/). We build a fact base from reliable sources

You can 100% do this. We do that at my startup (https://emergingtrajectories.com/ https://emergingtrajectories.com/). We build a fact base from reliable sources or information you give us, and we have multiple layers of checks to ensure the LLM only references those facts. It is not 100% foolproof, though, and depends on how broad your universe of knowledge needs to be. If you can only cite from 3 sources or 100 facts, this is easy to verify and force... For Google, they need to have the world's information (they are a global search engine, after all) -- deciding what is true or not is incredibly complex and there are many shades of grey. I think part of this is also just eye-catching headlines -- Google searches aren't reliable either, but we've learned to live with them and incorporate them into personal workflows that work for us. LLMs are new and we're still figuring out how to do this as users (and as product builders).