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Might as well throw them in the lake and if they float they are made of wood and there fore..... A Witch!!!! Polygraph tests are not reliable at anything. Especially telling if someone is lying. I'm guessing this is a way of not having to pay prize money. In my experience the better fisherman on the ice usually win the derbies. I wouldn't waste my time or money with such an outrageous requirement. Just my 2 cents and college degree talking.
Might as well throw them in the lake and if they float they are made of wood and there fore..... A Witch!!!!