Related:

• How many cataloguers -- does it take to screw in a light bulb?
  One, but the Library of Congress has to do it first....
• How many elephants -- does it take to screw in a light bulb?
  Only one, but it has to stand on a trunk to do it....
• How many doctors -- does it take to screw in a light bulb?
  Only one, but he has to have a nurse to tell him which end to screw in....
• How many procrastinators -- does it take to screw in a light bulb?
  One - but he has to wait until the light is better....
• How many editors -- does it take to screw in a light bulb?
  Only one, but first they have to rewire the entire building....
• How many men -- does it take to screw in a light bulb?
  Only one, but you have to nag him for a fortnight first....
• How many bassists -- does it take to screw in a light bulb?
  Just one, but the guitarist has to show him fi...
• How many IBM PC owners -- does it take to screw in a light bulb?
  Two. One to do it, but one to check the new bulb for viruses first....
• How many Mahayana Buddhists -- does it take to screw in a light bulb?
  Four - One to screw in the light bulb, one to not screw in the light bulb, one to not not screw in the light bulb, and one to not do any of those....