Oh, well, if we're going to be serious, I am often wrong, and don't mind admitting it. It's the best way to learn. IIRC I admitted a mistake here just a few hours ago, and expect to make more mistakes soon.
It's actually a measure of self-confidence. When you get to the point where you can say to yourself: "I make mistakes; I will try to learn from them," you have made a major step forward. Being wrong doesn't make you bad or stupid, it makes you human. Being able to admit you're wrong makes you mature. Lots of people never get to that point. Try it, you'll like it.