Given that Al Gore has no job, he decided to take a sightseeing
    vacation to Europe.  While visiting Europe, he is invited to
    tea with the Queen.  He asks her what her leadership philosophy
    is.  She says that it is to surround herself with intelligent
    people.  He asks how she knows if they're intelligent.  "I do
    so by asking them the right questions," says the Queen. "Allow
    me to demonstrate."
   
    She phones Toni Blair and says, "Mr.  Prime Minister, please
    answer this question: Your mother has a child, and your father
    has a child, and this child is not your brother or sister.  Who
    is it?  Tony Blair responds, "It's me, ma'am."
   
    "Correct.  Thank you and goodbye, sir," says the Queen.  She
    hangs up and says, "Did you get that, Mr. Gore?"
   
    "Yes ma'am.  Thanks a lot.  I'll definitely be using that!"
   
    Upon returning home, he decides he'd better put some of his old
    friends to the test.  He calls Bill Clinton and says, "Hi,
    Bill, I wonder if you can answer a question for me."
   
    "Why, of course, Al.  What's on your mind?" "Uhh, your mother
    has a child, and your father has a child, and this child is not
    your brother or sister. Who is it?" Clinton hems and haws and
    finally asks, "Can I think about it and get back to you?" Gore
    agrees and Clinton hangs up.
   
    Clinton immediately calls members of his old staff, and they
    puzzle over the question for several hours, but nobody can come
    up with an answer.
   
    Finally, in desperation, Clinton calls Colin Powell at the
    State Department and explains his problem. "Now look here, your
    mother has a child, and your father has a child, and this child
    is not your brother or sister.  Who is it?" Powell answers
    immediately, "It's me, of course, you idiot."
   
    Much relieved, Clinton rushes back to call Gore and exclaims.
    "I know the answer Al!  I know who it is!  It's Colin Powell!!
   
    And Gore replies in disgust, "Wrong, it's Tony Blair."