There are lots of "believers" out there. In the scientific community there are probably the most believers.
Why do I say this? Well because most of the scientific articles or interviews start with "I believe" or "we believe".
I believe that the Earth is not flat"
"We believe that man descended from a common ancestor with modern apes"
"We believe that global warming will lead to catastrophic environmental changes."
A simple way of proving that a theorem is true, is to prove that the reverse theorem is false (absurd).
For example: "The Earth is flat".
An easy theorem to prove false (absurd), nowadays LOL.
I wonder how many theories I believe can be proven (or disproven) using this method. I guess I will have to find out one by one.