Hmm, I remember my own run in with JW, at leat I think they were JW.
Anyway, two tennagers come by with their suits and their parents in their big old van, wanting to save me. Now I agree that people should be able to believe in what they want and all, but I told them straight up that I didn't want anyone trying to be a door to door salesman with their religion, which goes against how I feel you should preach christianity, through action and life, not words.
However they continued to argue, and I was to nice to slam my door on them, so I made them a deal. If they would listen to my question and story and answer in a fashion that I could agree with, then I would get in their van and talk to their elders. But, if they could not, then they would promise to leave me be. Hesitently they agreed and fell into my trap.

I told them of the origins of the word contridiction, how a general was told by a merchant that he could by a unstoppable spear and a shield that could stop all without fail. The general then ordered the two best warriors he had to attack each other with these items. The result was that the spear broke as well as did the shield. Thus a contradiction.
After this I asked them, if you are never allowed to think about that which you preach and learn, how can you truely know that it is the right answer? If you never know, how can you know anything?
One of the boys immedietly sprung up and gave a weak answer, about how it is sinful to question God, the other tried as well but I could tell that my little story had sheken him alittle. End result was both boys left sadder but hopefully alittle wiser.
Then again, they never did leave me alone in Nebraska, guess logic is wasted on fools.