Originally Posted by
MorpheusSandman
My $0.02:
I tend to think of the issue over the labels of agnostic and atheist usually refer to one's level of certainty/uncertainty and one's claim about that certainty. "Agnostic" literally means "without higher knowledge." The original word was coined to present the idea that we can't know if there is a higher power out there (and, even if there is, we can't know anything about it). The word has come to be used to define people who "aren't sure" whether there's a higher power or whether they believe in one. Atheist really just means a lack of belief (someone is "without theism"), so all agnostics are atheists "in a sense" because they don't "believe" in a higher power (sometimes they're not sure whether they should believe or not). But there are also the atheists that aren't agnostics in the sense that they claim to be pretty sure (if not completely sure) there is no God or other higher power. So one claiming they're agnostic is a way to get around them having to claim that there is no God/supernatural/higher power, etc.
Personally, I claim to be an agnostic atheist. I don't believe in any gods or any supernatural, but I do not claim to know for sure they don't exist. There's always an immense unknown out there, and it is possible (although remote, in my mind) that something somewhat matching the various ideas of any god or supernatural could be out there in the places we just don't understand yet. But considering the fact that every time we come to understand something new it turns out to be perfectly natural (even the things that were previously thought inexplicable and were therefor caused by God/gods) I think there's a good reason for rejecting the notion of the existence of gods or supernatural. But can I claim with certainty there are none? No. But do I believe in any? No. Hence: agnostic atheist.