Many managers, especially those recently promoted to positions of authority, think they always have to be right. They believe everyone will scrutinize them now, so they can't afford to be wrong because that would show weakness. They believe their credibility will be affected if they make a mistake or don't know something. Quite to the contrary, a manager who admits mistakes and is willing to accept team members' suggestions graciously will gain infinitely more respect and become a source of inspiration.
Who is right and who is wrong doesn't matter.
Reaching goals and achieving success is the ultimate barometer. Great leaders make mistakes all the time, but the key is whether they are able to extract the very best from their people.