6: 2 to screw in the bulb and 4 to testify that it was lit from the moment they began screwing.
or
100: One to do it and ninety-nine to say "I could've done that."
or
I just found the Bush that Jeb lost."
or
1,000,001: One to change the bulb and 1,000,000 to rebuild civilization to the point where they need light bulbs again.
or
We'll see about that."
or