Ybe an atheist

[Angrboda]

It doesn't follow that because one has presented only testimony that one has no arguments to show why atheism is rational.

True, but then it just becomes "I have proofs" "no you dont" "I analyzed the proofs properly" "No I did" which is childish.

Since the OP simply asked the question "Ybe an atheist," their testimony as to the reasons for their atheism are sufficient, so long as those reasons, if true, are prima facie reasonable. What you and Ybe want to do is turn this thread into an absurd example of moving the goalposts to the question, "What proof and evidence do you have that your beliefs about the evidence are reasonable," the answer to which could fill volumes, but which likely you, he, and everyone else in this thread are already familiar with. In that sense, your complaint and his is simple intellectual dishonesty; the thread has never been a call for an evaluation of evidence, but rather a simple request for the basic foundations underlying lack of belief. No greater elaboration really need be made.

If on the other hand, you want to accuse someone specific of being irrational in their unbelief, I suggest you step right up and take your best shot.