So here's my plan for winning a bar bet. I'll say to someone, "do you want to see a picture of some identical twins?" They'll say, "sure," and I'll show them the above picture. They'll say, "those two look nothing like each other! One's a girl, and the other's a boy."
I'll offer to bet them $100 that they are, in fact, identical twins. They'll say, OK, but how can you prove it? I'll say, "Here's a picture of their identical twins."
