Comment by earless1

In the situations you mentioned, it doesn't seem the end goal is to be 100% correct about things. Approaching these situations with a curious mindset is key. You may be able to provide a set of options that encompass your understanding of the thing being asked without pinning yourself down to a specific outcome. Once you've allowed folks to understand the potential options, you can tell them you can get back to them with specifics and understanding of implications.