Except that telling someone a lie, especially in professional context, can be completely discrediting, especially whenever trust is crucial. I work with people

Except that telling someone a lie, especially in professional context, can be completely discrediting, especially whenever trust is crucial. I work with people able to say: "I don't know", "I'm not sure", "Hard to say", "I need to do some extra work to verify this". Working with such people is very efficient because you don't waste context on fact-checking their every utterance. Can they be wrong? Absolutely, but it's relatively rare. Will they decide to just lie to me? Extremely unlikely, given the stakes.