This. Nobody is 100% trustworthy in every circumstance. When I say I trust someone, what I mean is that I have a good handle on what sorts of things that person can be trusted about, and what sorts of things they can't.
Exactly - you have a reasonable model of a person. So it also includes things like a recommendations giving you the _opposite_ of the purported opinion. Or trusting the details are technically true, but missing the forest for the trees. Or any other contextual interpretation of the data.
