Having become totally intrigued by the prospect of atheist fundamentalism I did the High School Debating thing and looked up the definition of fundamentalism. It is a belief in the literal truth of the bible (not applicable to atheists) and also 'a movement stressing strict adherence to a set of basic beliefs or principles, esp religion' and since the whole thing about athesism is a lack of belief (and possibly principles) that does not seem to fit either. It seems that it would be impossible to argue the case for atheist fundamentalism. So I am left with 'fundamental'. It simply states that fundamental means 'of central importance' and the fact that an atheist thinks there is no god is clearly of central importance, so maybe at entry level it is possible to be a fundamental atheist. However for greater flights of fancy I find that I agree with DA on this:
"You can't become more extreme than the simple declarative sentence."
