How many lesbians does it take to change a light bulb?

Three: One to screw it in, and two to talk about how much better it is than with a man.
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How many mathematicians does it take to screw in a light bulb?

One. He gives it to six Californians, thereby reducing the problem to an earlier joke...

In earlier work, Wiener [1] has shown that one mathematician can change a light bulb.

If k mathematicians can change a light bulb, and if one more simply watches them do it, then k+1 mathematicians will have changed the light bulb.

Therefore, by induction, for all n in the positive integers, n mathematicians can change a light bulb.

Bibliography:

[1] Wiener, Matthew P., <11485@ucbvax>, Re: YALBJ, 1986
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What has ears like a cat and a tail like a cat, but is not a cat?

A kitten.
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What's the difference between a lawyer and God?

God doesn't think he's a lawyer.
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I went to the doctors the other day and I said, 'Have you got anything for wind?'

So he gave me a kite.

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Where do you go to find a million story building?

You go to the Library!
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A priest, a rabbi and a vicar walk into a bar.

The barman says, "Is this some kind of joke?"
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I think I want a job cleaning mirrors.


It's something I could really see myself doing.
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How many engineers does it take to change a light bulb?

First they have to agree on which is better; the analog bulb or a digital bulb.
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What do you call a wheel made of iron?

A ferrous wheel.
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