A hard-core atheist boards an airliner. A young girl takes the seat next to his. The atheist says "You know, these long flights seem to go a lot quicker then there is some good conversation. Would you like to talk with me?"
The girl answers "Sure. What do you want to talk about?"
The atheist says "I want to talk about how there is no god, there is no heaven, there is no hell, and there is no afterlife."
"OK, those could be interesting topics" says the little girl, "but first, can I ask you a question?"
The atheist nods.
"Alright, a deer, a cow and a horse all eat the same thing: grass. Why is it, then, that the deer poops little pellets, the cow poops runny plops, and the horse poops big clumps?"
Intrigued by the girl's obvious intelligence, the atheist pauses for a moment and says "I really don't know."
To which the little girl responds, "Are you really sure you're qualified to discuss such deep topics as the existence of God and life-after-death, just moments after publicly demonstrating that you really Don't... Know... Crap...??"