What Kind of Atheist are You?

[robvalue]

Probably quickest to just say to the theist "Make your claim."

Try not to laugh until they've definitely finished. You could have a series of cards to hold up.

That would be good for debates actually. Have logical fallacies written on cards, so when your opponent rants on for 45 minutes talking garbage, you can hold up the cards at the relevant points to identify the problems. Particularly good if it's being recorded.