The problem is deciding whether someone is actually an expect in a subject area where I'm not. People can say things that are patently absurd about one field w

The problem is deciding whether someone is actually an expect in a subject area where I'm not. People can say things that are patently absurd about one field while being an expert in another, but I also can't just be completely credulous in treating any assertion about any subject I do not understand as true. I don't really have much else to do but build out from a network of trust rooted in people who seem competent and clear-minded by whatever criteria I can judge.