How many existentialists does it take to change a lightbulb?
Two. One to change the lightbulb and one to observe how the lightbulb symbolizes an incandescent beacon of subjectivity in a netherworld of Cosmic Nothingness.
How many Marxists does it take to change a lightbulb?
None. The lightbulb contains the seeds of its own revolution.
How many Episcopalians does it take to change a light bulb?
Six. One to change the bulb, and five to form a society to preserve the memory of the old light bulb.