Why do you think God isn't real?

It's almost silly, when you come up with a theory (god..), you can't ask others to prove that it's not true. There is a name for this, can't remember it. Anyway, while right now we can't personally prove he doesn't exist, but you can't prove he does. For example, if you told me right now that there are 1,000 invisible men around me, I couldn't prove it false, but you can't prove it true.