Originally Posted by aabbcc
You are actually right, but in sort of different way... "Non-believer" is not exactly the best term, but neither is "atheist", if you want to be precise.
There is a difference between the following:
1) I do not believe there is G-d.
2) I believe there is no G-d.
The former sentence is simpler than the latter since it is simply negatively correlated to that which it speaks of; the latter one is a positive statement and assumes a kind of belief, even though that belief is expressed negatively ("believe there is no" as opposed to "believe there is"). Technically, we call both positions to be "a-theist" ones without making an important distinction between them.
Technically, the position 1) is non-believer and atheist - it defines itself as negation of believer, and negating G-d makes it atheist. The position 2) is believer and atheist - it defines its position of negating G-d, which makes it atheist, by belief in the lack of G-d.
That being said, most of self-proclaimed atheists I have personally met are actually agnostics, but fail to differentiate the two.
Atheism, especially in its militant forms, is way more often a reactionist ideology (in lack of better term), which is based on "evident truth" that there is no G-d, the argumentation of which is, in most cases, not much better than the theist pseudo-argumentation (now some of you are going to tell me that it is impossible to argumentate the existence of G-d, and I will say, "Bravo! You finally get what I was saying in my previous posts which some people eisegised!" ). Most of atheists take agnostic position, and out of the "lack of possibility to logically conclude whether there is G-d and verify His existence or lack thereof", which is an agnostic position, jump to deus ex machina 'conclusion' that, thus, there is no G-d, question resolved. So atheist in the principle denies the existence of G-d as transcendent and immanently necessary being, but cannot 'argumentate' such position any more than theist can argumentate his or her theism.
If you put things this way, atheism is as irrational as theism - the position "there is no G-d" which assumes "provability" and "argumentability" of itself would be rational, but just as I have never found a 'proof' of G-d's existence which was not logical fallacy or manipulation which may technically be not fallacious but still not a proof due to flawed premises or alike (you know, supposing linearity based on characteristics of that which you are only about to prove, and such), I have never found a proof there is no G-d.
Whatever, not that I care.