It starts with asking the punter "Have you ever lied?" When the reply is "Yes" They then ask "What does that make you?".
"A liar" is the logical response.
"Have you ever stolen anything?"
"What does that make you?"
Having put the mark on the defensive and made the mark admit his own"sin", the WOM evangalists then give chapter adn verse on how the reward for sin is hell, but you can be saved through the sacrifice of Jesus.
I had always thought a valid riposte would be to ask the evangalist if he had ever been kind, or helped anyone, or loved anyone, because by their own logic that would make him a kind, helpful, loving person, but of course they would then quote the Bible to show that our good works count for nothing before god.
I much prefer this excellent response from Over at the Richard Dawkins Net Forum by Sevlevboss:
I'll answer your questions if you answer mine.
1) Have you ever worn a diaper?
2) Have you ever drooled?
3) Were you breast fed?
OK, I may be a blasphemous liar, but you are a drooling, pants shitter who sucks his mom's tits!