And then children get the lesson that changing your mind is always a good thing. The new idea is always right.
You can throw in some alternative cases as well. But, as it stands, I don't think a strong bias towards discarding deeply held beliefs is a big problem in humans. We can meander quite a distance in that direction before it begins to become a problem.
Yvain isn't a big enough self-promoter to link to this, but I liked it a lot and I think you will too.
"The Last Temptation of Christ"