Schick is trying to sell a computerized
crystal ball he's  
  recently invented to a marketing executive, but the
 executive is very skeptical.
 Schick says, "Go ahead and type a question into the
 crystal ball."
 The executive types, "Where is my father?"
 The crystal ball answers, "Your father is
 fishing in Michigan."
 The executive says to Schick, 
 "I knew this was bullshit. My 
 father's been dead for twenty years."
 The inventor says, "Ask the question in 
 a different way."
 The executive types in, "Where is my
 mother's husband?"
 The computer answers, "Your mother's 
 husband has been dead for 
 twenty years. Your father just landed a 
 three pound trout."