From time to time, someone will bring up the argument that if atheists really kept an open mind, they would be agnostics rather than atheists. Atheism, they claim, is an almost religious position in that it's just as fundamentalist a position as any devout religious person. I'll deal with why suggesting that atheism is religious in any way at some other time. In fact, I'm pretty sure I've dealt with it before, but let's look at this question of agnosticism.
I'll keep it simple.
There is really no such thing as an agnostic. Either you are a theist who hasn't decided which God is the real God, or you haven't decided which religion is the real (or true) religion, which is kind of the same thing as not knowing which God is the real God. You think there's some kind of 'force' or supreme intelligence out there but you don't feel qualified to say what form that being might take.
If, however, at this moment in time, meaning right here and right now, you do not believe that there is a God, then you are an atheist. If, you don't believe that there is a God, at this very moment, but you're holding open the door to the possibility that with additional information this may change, then you are still an atheist. Because at this moment, you do not believe that there is a God. Keeping the door open to new facts does not make you an agnostic if you don't currently beliefe there is a god. It does mean you're honest and rational because you recognize that new facts could change the argument. New information must always be considered.
Which doesn't change a thing.
Either you believe there is a god, or you do not.