This article from Live Science this morning.
http://www.livescience.com/cul....html
I never have understood why people are arbitrarily condemned for changing their minds based on evidence. The political campaigns and talking heads arbitrarily condemn, but that just shows weakness on their parts in an attempt to get votes.
Funny thing about education. The more you learn the better you can make informed choices.
If a change in stance is done solely to get votes, the change isn't the problem. The lack of character is. Same thing the other way. Not making a change in your stance when there is mounting evidence against it is just as wrong.