I was so expecting this question.
Anyway, I wish I could explain but I don't think I can. Maybe something like, you will accept certain things/conclusions as long as they are in complete accordance to your own beliefs/knowledge, and if you later gain new knowledge on the same subject/things than you might change your opinion, sometimes even drastically, no matter how contradicting it would be to the previous one you 've had or something... But I don't know, this is lame, I better let Ezra explain what he's talking about, because I might as well be missing his point too.