.... and the Earth is flat, women are inherently less intelligent, spirits bring the rain, mingling blood creates babies, the brain cools the blood, and every other belief once believed by massive segments of the Earth's population is correct.
.... I would suggest that you start by reading all of http://wiki.lesswrong.com/wiki/How_To_Actually_Change_Your_Mind , and if you already have, then I would suggest that perhaps this website is not for you. Or that you really, really need it. One of the two.
Why, yes, the fact that many people once believed the Earth is flat is, when taken in isolation, strong evidence that the Earth is flat. Smartass.
What do you believe that most people on this site don't?
I'm especially looking for things that you wouldn't even mention if someone wasn't explicitly asking for them. Stuff you're not even comfortable writing under your own name. Making a one-shot account here is very easy, go ahead and do that if you don't want to tarnish your image.
I think a big problem with a "community" dedicated to being less wrong is that it will make people more concerned about APPEARING less wrong. The biggest part of my intellectual journey so far has been the acquisition of new and startling knowledge, and that knowledge doesn't seem likely to turn up here in the conditions that currently exist.
So please, tell me the crazy things you're otherwise afraid to say. I want to know them, because they might be true.