People aren't stupid for believing, they're just ignorant. By that I mean they're ignoring logic and evidence when it's presented to them.
A good example of what I'm talking about is how in almost every thread regarding religion people have to explain the basics of evolution to you. You usually end the conversation with a very polite "thank you for explaining this to me." Which is great. But then another thread pops up and you act like no one has ever explained evolution to you.
I ask so I can understand why you (generic you) believe in it. Sometimes, people say "evidence", but when talking to them, it's because they're dissatisfied with religious explanations...on these boards, more pointedly.
So that begs the question: "is it really due to evidence, or because you're simply picking a more accepted explanation?". To me, that's not sound reasoning.
In these threads, its the latter question. I think there is a difference between accepting something on its own merits, and accepting it because someone else didn't give you the answer you wanted initially.
I actually am more interested in people's reasons for accepting than actually what it is so that way I can understand them better.
For the record, I think a lot of assumptions are made in evolutionary theory regarding how we actually came to our current form, how we may have lived, communicated, etc, starting from when we first got here, to somewhere around 10,000 years ago up until now.
When were we first able to write? From what I've read, there is no record of fully developed languages dating back no further than about 5,000 years ago.
I think between the mutation of our common ancestor and 5,000 years ago, we simply guess and assume.
I could be wrong, though, as this is only my opinion.