Saying “I was wrong about that” out loud teaches everyone around you it’s safe to learn.

Groups take their rules about admission from whoever admits something first. Until then everyone assumes the cost of being wrong is high and acts accordingly, hiding confusion and defending positions well past believing them. One person saying it plainly resets the whole thing. It costs you almost nothing and changes what the room is willing to do.

Say it once this week, in front of people, about something small. No elaborate apology, just the plain fact and whatever you now think instead. Watch how the conversation loosens, especially from whoever had been quietest.