Theists: What is the most compelling argument you have heard for Atheism?

[Neo-Scholastic]

To ask that we accept on hearsay the claim that something seemingly impossible has happened asks us to believe what is unimaginable.  I decline.  The extraordinary requires more than the ordinary and it just isn't very difficult to determine what is extraordinary.  If it involves something never before documented and a process not understood, it's extraordinary and requires special vetting.  But for yourself of course you may be as tight or loose as suits you.

I can accept the idea that people require different degrees of proof. In my own case, no single item is conclusive or even particularly persuasive. It is the cumulative case, that I feel warrants belief. At the same time, it puts the lie to the idea that "no" evidence has been provided; but rather, just not enough to suit people who are willing to raise the bar if the conclusion doesn't match their preconceptions about how the world should work.