As the title of this thread indicates, the atheist need prove nothing. Atheism is a negative belief, and a negative is unprovable, therefore the burden of proof is on the theist. With apologies to J. M. Barrie, I don't believe in fairies. I also don't believe in unicorns, the Loch Ness monster, Thor, Zeuss, Jehovah, Baal, Wotan, Apollo, Isis, Osiris, Vishnu, Allah, Krishna, Brahma, Ganesh, Chalchiuhtlicue, or any other made up deities. I don't need to prove any or all of these do not exist. If you have evidence that any of these actually exists, the burden of proof is on you to persuade me and the world with the weight of your evidence. Until then, intellectual honesty requires, not agnosticism, but atheism. If you are agnostic about one of these things, you must be agnostic about all, and if you are agnostic about all, I don't know how you ever make a decision about anything, as you must be indecisive about everything. After all, if you are agnostic about everything you cannot disprove, than you are agnostic about every idea ever conceived by anyone. At some point, you must realize that the only rational position is to believe only that which is supported by evidence.