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• How many blind people -- does it take to change a light bulb?
  It depends whether the switch is on or off. If the switch is off, one....
• How many witches -- does it take to change a light bulb?
  It depends on what you want them to change it into....
• How many SAS programmers -- does it take to change a light bulb?
  It all depends on whether they can read the manuals or not....
• How many magicians -- does it take to change a light bulb?
  Depends on what you want to change it into....
• How many scientists -- does it take to change a light bulb?
  None. They use them as controls in double blind trials....
• How many supply-siders -- does it take to change a light bulb?
  None. The darkness will cause the light bulb to change by itself....
• How many blondes -- does it take to change a light bulb?
  It depends how many blondes there are, but some people prefer it with the lights off....
• How many Maoists -- does it take to change a light bulb?
  One to screw in the bulb and a thousand to chant "Fight Darkness!...
• How many Romanians -- does it take to change a light bulb?
  How many packs of cigarettes are you willing to give them?...