I always explain it this way: "The odds of getting a Royal Flush in poker are 649739 : 1. So, if you are playing someone and they present a Royal Flush, what a

I always explain it this way: "The odds of getting a Royal Flush in poker are 649739 : 1. So, if you are playing someone and they present a Royal Flush, what are the odds they are cheating? What if the person you were playing was the Dali Lama [or insert another person who has little reason to cheat]?"