This article matches my own life experience: Rather than what have you changed your mind about in the past decade, I use 'in your whole life'. Speaking personally, there are only two big things I've changed my mind about. I'm working on a third... I wish the article had included something in the vein expressed by Charlie Munger, which is a 'how-to' for intellectual integrity.

"I never allow myself to have an opinion on anything that I don't know the other side's argument better than they do.”