How do you prove you havent bitten anyone? Lie detector? Plastercast of your teeth? A line-up with your mouth open? Two little indents on their neck? A muzzle that is rusted shut on your face? Clear evidence that your teeth were surgically removed years ago?
You "prove" it in the negative -- as when the alleged "victim" cannot show any credible evidence of bites. The plaster cast idea seems pretty crafty too--but it would have to be butressed by expert medical opinion.


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