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

[Brian37]

It really goes to show how easily and unknowingly our minds can fall prey to confirmation bias. For every piece of "evidence" in the Bible there are 20 pieces of evidence against the Bible. An individual without belief in Christianity is quite unlikely to become a Christian solely from reading the Bible, but for Christians it is the Bible that often reinforces their beliefs. Same applies to Muslims and the Quran.

Holy books tend to be choose your own adventure

I'd say more like  "Chose your own delusion". It is more understandable when your a kid to choose Superman over Batman or Star Wars over Star Trek, but religion as an adult, it simply looks silly to me that you'd hang out in fantasy land at that age. I don't hate the religious, not one bit, but I cannot take it seriously outside when it tries to interject itself lawmaking or global conflict. In that context I do have to take adults seriously because they can seriously affect my life with their delusion.