Atheists claim that it is an absolute fact that there is no supreme being or god.

Agnostics say that atheists are probably right but that proving it is not possible.

*EDIT*  Those modding me down should look at the definitions first:

* [Atheist](http://www.google.com/search?q=define%3A+atheist)
* [Agnostic](http://www.google.com/search?q=define%3A+agnostic)