How many consultants -- does it take to change a light bulb?

Related:

• How many consultants -- does it take to change a light bulb?
  I'll have an estimate for you a week from Monday...
• How many pre-med students -- does it take to change a light bulb?
  None, pre-meds don't screw, they study...
• How many university professors -- does it take to change a light bulb?
  Just one, but once we get tenure, we don't change anymore...
• How many programmers -- does it take to change a light bulb?
  One, but you can never change it back again...
• How many nihilists -- does it take to change a light bulb?
  There is nothing to change...
• How many electrical engineers -- does it take to change a light bulb?
  We don't know yet. They're still waiting on a part...
• How many assholes -- does it take to change a light bulb?
  None, assholes never see the light anyway...
• How many husbands -- does it take to change a light bulb?
  We'll know as soon as one gets off the couch and does...
• How many screenwriters -- does it take to change a light bulb?
  "Why do we have to change it...