None. Bill Gates will just redefine Darkness® as the industry standard.
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A river.
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They turn from notating nuclear spins to notating unclear puns.
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Bike helmets don't fit hippos
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50. One to screw in the light bulb and the remaining 49 to guard him .
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Three - one to cast the bulb into the outer darkness, and two to catch it when it falls.
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Fish and ships.
or