[quote=Jorick]
I know the meaning of the word agnostic, but I guess I can't fault you for feeling it necessary to explain. Lots of people seem not to understand the meaning of the term, because I guess it's hard to find the definition of a word even on the internet. Also, the four quadrant model of beliefs is typically stated with the paired antonyms of theist/atheist and gnostic/agnostic. Substituting theist for religious is misleading because atheists can be religious too; for example, those "there absolutely is not god" atheists and religions like Buddhism that lack deities. Substituting gnostic for fundamental is misleading because fundamentalism is a particular brand of gnosticism and one can hold gnostic belief without being fundamentalist; for example, Christians who absolutely believe in the existence of their deity but do not think the Bible is the literally true word of that entity hold gnostic belief in said deity but are not fundamentalists.
[/quote]

I had honestly just really learned the differences between Agnostic and Atheist only recently.
Before I always treated Agnostic as meaning "Believes in a God, just not any worshiped one".
And being someone who wasn't able to learn that until recently, and having spent several years in religious debates (From both sides) I felt the need to clarify since it is a term that many people have a misleading idea on.

This is all a pretty complex issue though, I grant you that.
Most likely we'll need even more terms and definitions than the LGBT community has (and they have a lot) in order to properly make sense of and understand all the different stances and such people take.

But so far what we have gathered is:

Agnostic = Unknowing
Gnostic = Certain Extreme Beliefs
Fundamentalist = All the Extreme Beliefs

If I'm understanding this right that is.