Two. One to get up on his high horse and another to chastise the first about oppressing horses.
5,6,7,8
We're on our sixth.
Only one, but the light bulb really has to want to change.
Two. One to change it and one to put some chips with it.
The test subject is the only one you'd willingly ask to "tell us about yourself."
Oh don't worry, they'll let you know.
Get off your high horse.
None. Once they shut up, no-one has any reason left to oppress them :)
Rye-ot