I ain't buyin those fancy Big-Government ones. The free market idn't ready.
Two. One to identify that the lightbulb has indeed burned out, and one to call the maintenence man to change the lightbulb.
Daughter: You told me to change the baby.
N! One to change the light bulb, and n-1 to display stereotypical behavioral traits of X!
Just two, but how they get in there.. I don't know. (Stolen from an old Maxim in my dad's storage)