It sounds like wuf is trying to get at a core question of why do we believe anything and how do we justify those beliefs?
Maybe with the deeper question: are there things worth believing that have always been things which people believe?

It's always murky at the bottom.
Bear with me:
I saw some YouTube video with Bill Nye going through some evolution-denying / creationism "museum" with a religious creationist giving him a tour. The tour guy kept trying to say that Bill believes in evolution because he made up his mind to believe in evolution, then sought data to verify his assertion. Bill kept arguing that he made no decision until he was presented with evidence which favored one argument or model over the other.
OK:
So the problem I have is that, if the creationist guy was clever, he would have said something like, "So you decided that evidence leads you to believe things. What led you to believe in evidence?"

You see? It's tricky to answer. Ultimately, if you keep asking why anyone believes anything, eventually that well dries up... so to speak.