When you get challenged by a coach on a rule, tell him you'll get the book and look it up. Tell him that if he's right, you'll give him $10, but if you're right, he has to go out to the parking lot and wash your car. Then hold your hand out for him to shake on it. He'll just turn around and walk away.
I've done this quite a few times and it usually shuts them up for the rest of the game.
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Yom HaShoah
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