Define "light bulb".
None. They live in eternal darkness.
100. 1 to change the light bulb and the other 99 to complain about how the old light bulb was much better.
All of them.
Two. One to hold the light bulb and one to drink until the room spins.
Because they philos all the time!
It depends on the definition of lightbulb.
Hint: It's a dead giveaway.
me: define "child"