Ten Commandments of Logic: ad hominem, straw man fallacy, hasty generalization, begging the question, post hoc, false dichotomy, ad ignorantum, burden of proof reversal, non sequitur, bandwagon fallacy
"People who don't like their beliefs being laughed at shouldn't have such funny beliefs."
Brad Reddekopp
"I contend that we are both atheists. I just believe in one fewer god than you do. When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours."
Stephen Roberts
"A casual stroll through the lunatic asylum shows that faith does not prove anything."
Friedrich Nietzsche
"You can't say something is 'real', and then claim it exhibits none of the properties of any other real objects, and can't ever be examined or analyzed empirically. That's pretty much a good definition of 'not real'"
PZ Myers
"What can be asserted without evidence can be dismissed without evidence."