Picasso dies and arrives at the pearly gates. St. Peter is there, and he tells Picasso "before I can admit you to heaven, I need to verify your identity. Can you prove that you're really Picasso?" Picasso asks for a canvas and paint and quickly creates a bizarre scene for St. Peter who says, "you really are Picasso!" and lets him into heaven.Einstein dies and the same routine happens. He asks for a chalkboard and chalk and posthumously unifies general relativity and quantum mechanics for St. Peter, who says "you really are Einstein!" and lets him into heaven.Then, George W. Bush dies and arrives at the pearly gates. St. Peter asks him to prove his identity, and Bush answers "Why should I have to do that? I was the president of the United States!"St. Peter sighs and tries to explain, "Look George, Picasso proved he was Picasso, and Einstein proved he was Einstein. Can't you please cooperate?"Bush blinks, scowls and says: "Who's Picasso and who's Einstein?"