They screw millions of bulbs every day, but when it comes to your bulbs, there's no record.
or
They turn from notating nuclear spins to notating unclear puns.
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They charged one - and let the other one off.
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What's up, dock?
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As many as possible, and don't *ask* what they do with the old bulb.
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1,000,001: One to change the bulb and 1,000,000 to rebuild civilization to the point where they need light bulbs again.
or