I think the question of whether or not I'm an atheist or an agnostic is purely
a matter of perspective. When a believer asks me whether I believe in the
existence of god, I say no, so from his perspective I'm an atheist. But when
someone asks me whether I can prove that god does not exist, I also say no,
so from that perspective I'm an agnostic (since I don't have definite
knowledge of god's non existence).
Out of these two perspectives, however, I lean towards the first (i.e. I'm an
atheist because I do not believe in the existence of god) because the second
perspective, i.e. requiring me to prove the non existence of god, is a both a
logical fallacy and an unfair burden. To elaborate what I mean, let's change
the topic from existence of god to the existence of the Invisible Pink
Unicorn (IPU). I claim that the IPU exists because no one can prove that it
doesn't. This proposition of "true unless proven otherwise" is clearly a
logical fallacy, i.e. if "X is true because there is no proof that X is
false", then it can be argued that not only that the Invisible Pink Unicorn
exists, but so does the Flying Spaghetti Monster, dragons, aliens, flying
saucers, and what not. My defense of the IPU's existence ("true unless proven
otherwise"
is also an unfair burden on you because if I make an outlandish
claim, then the burden of proof obviously lies on me, not you. Now back to
god. This outlandish claim needs to be proven by those who claim it, not me,
and the defense that it's true because I can't prove otherwise is nonsensical
and fallacious. I thus can not see how I can consider myself an agnostic,
because the perspective that makes me look like an agnostic is bunk. In
conclusion....
I'm an atheist.