I would think that fundamentalism is when theists will never shift from their belief regardless. As - I think it was - Kurt Wise who said how he would never shift from his belief in God even if all the evidence in the world turned against creationism. I haven't got TGD with me atm as I'm on public comp, I think it was him though... but anyway - fundamentalism=sticking with the fundamentals no matter what I would have thought. Or at least that attitude if they in fact lost their faith, that wouldn't mean they weren't a fundamentalist. It's simply I think that - fundamentalism is this attitude of never shifting from their belief, it's absolutely fundamental, regardless of reasoning and evidence. And this is self-admitted.
EvF
EvF
