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• The difference between genius and stupidity is that genius has its limits.
• There is such a fine line between genius and stupidity. -- David St. Hubbins, Spinal Tap
• Homer: Wait a minute. That word you keep calling me?
  Artie: Ignoramus? Homer: Ignoramus? It means I'm stupid, doesn't it!...
• What's the difference between a hormone and a vitamin? You can't make a vitamin...
• André Bensoussan once explained to me the difference between a programmer and a designe
  "If you make a general statement, a programmer says, 'Yes, but....