The reason i say this is because i love the idea of people being able to change their minds.  How great that we have the ability to educate and, therefore, influence each others' thoughts.  Problem is, when you really think about it, we have so few people to actually interact with.  So few opportunities to genuinely have our minds changed.  This leaves us fixed in our beliefs and far too confident in our opinions.  We're right, they're wrong.  You can see and hear it everyday about almost everything.