Sigh. Wrong wrong wrong.
It's a leap of faith to accept
positive atheism, which is essentially, "I am certain there is no god."
It's NOT a leap of faith to accept
negative atheism, which is essentially, "I lack belief in any particular god because I haven't seen evidence for it."
Can you either learn to read/think or just go away? Honestly, this is getting silly.
Oh really, the only things we should believe in are those which can be proven 100%?
Do you believe you're reading this on a computer right now? Because any philosophy 101 student can explain all the reasons that could
technically be untrue and you wouldn't know it.
Stop looking for absolute certainty. The real world operates in probabilities, not absolute certainties.
As such, I'm an agnostic atheist because I consider it
extremely improbable that any popular theist conceptions of God exist.
I don't know this for certain, but being that I've seen no evidence for it, I'm forced to consider it as a probability cloud, not as an absolute yes/no proposition. This is true of almost anything--we conceptualize ideas in terms of
truth probability, not in terms of absolute truth or falsehood. We simply don't have enough information to describe much of anything in these terms.
And you need to check your definition of atheist. Faith in the nonexistence of God is NOT a prerequisite.