Two zebras are talking, and one asks the other, "Am I black with white 
stripes or white with black stripes?"

The other zebra replies, "Well I don't  know. You should pray to God about that and ask him."

So that night he did and God replied, "You are what you are."

The next day he said to the other  zebra, "I still don't understand what I am because God just said, You are  what you are."

The second zebra responds, "You must be white with black  stripes or else God would have said, Yo is what yo is."