I don't understand why people have such an aversion to saying they were wrong on something. There's no complete instruction book on life we're given when we're born. There's no perfect recall of everything we've every been taught, and certainly no perfect knowledge of what we were taught growing up.

We keep learning new things until the day we die. That means for a big portion of our lives we're ignorant or incorrect on any number of topics. I see it as a sign of confidence, not weakness, to say "I was wrong". It means I'm not so shallow that my identity is threatened if new information comes to light.