okay. Anyway, atheists who reject the claim that 'God exists' arguing that this claim is unsupported is fine. What I still don't understand is the position of the atheists who go on to make the claim that God doesn't exist and who moreover don't fall in any of the following categories:
1. They have personal reasons due to which they don't feel that God doesn't exist.
2. They feel that they are knowledgeable enough so that if there was a God they would have known about it.
I think the natural position for those who haven't got any extra knowledge which the rest are unaware of, or who are not guided by gut-feelings etc should be agnosticism; that is leaving open the possibility of God and not saying that God doesn't exist for sure.
Speaking only for myself, I don't base my opinions on factual matters on "feelings". In fact, I do my utmost to avoid it. I recognize that we are all subject to some degree of unavoidable cognitive bias, and that this is a serious impediment to discerning the truth.
Because I am aware of the inherent limitations in human psychology, I am extremely skeptical of
every factual claim. IOW, I most likely won't believe
anything I am told until I can satisfy myself that a focused effort has been made to determine the truth in an atmosphere that limits the influence of cognitive bias. The only tool we have that is capable of limiting cognitive bias is empirical investigation (IOW, real science).
My mind has
always worked that way, ever since I was a child. So I never had to "decide" not to believe in God. I went to church every Sunday and listened to a lot of factual claims. I don't remember ever being offered sufficient empirical evidence to believe any of them. Since then, my horizons have broadened and I've heard more claims. I still have not been offered sufficient empirical evidence to believe any of them.
Furthermore, I have a very coherent hypothesis as to why no two religious people believe in the same "truth": I am quite certain that religious belief is a purely psychological phenomenon (and I
have seen enough empirical evidence to be confident in this assessment). The probability of one of the billions of religious people on earth actually being
right is pretty remote.
Arguments
for the existence of god fall into three general categories: appeal to popularity (how can billions of believers all be wrong?), appeal to authority (this or that book was written by God so it must be true), and appeal to emotion (believe in all this ballyhoo and you will live forever.) I am not easily influenced by logical fallacies.
Arguments
against the existence of god rest on foundations I can relate to: Logic, science and reason. I find any argument based on sound reason and empirical evidence very persuasive.
To sum up, I believe atheists and religious believers generally use different methods of discerning fact from fiction. For an atheist, the default position is non-belief until evidence is presented. For a believer, the default position is belief, regardless of a lack of evidence (and often in spite of counter-evidence).
Different strokes for different folks!