How many Borg does it take to change a light bulb?
1) Changing light bulbs is futile. Resistance is voltage divided by current. 2) None. They just self-destruct the malfunctioning equipment. 3) All of them.
How many philosophers does it take to change a light bulb?
1) "Hmmm ... well there's an interesting question isn't it?" 2) "Define 'light bulb' ..." 3) "How can you be sure it needs changing?" 4) Three. One to change it and two to stand around arguing over whether or not the light bulb exists.