Related:

• Q: How many jugglers does it take to change a light bulb?
  A: One, but it takes at least three light bulbs....
• Q:" How many jugglers does it take to change a light bulb?
  "A:" One - but it takes at least three light bulbs....
• Q:" How many light bulbs does it take to change a light bulb?
  "A:" One - if it knows its own Goedel number....
• Q: How many light bulbs does it take to change a light bulb?
  A: One, if it knows its own Goedel number....
• Q: How many missionaries does it take to change a light bulb?
  A: 101. One to change it and 100 to convince everyone else to change light bulbs too....