Bozo The Clown has real hair on his head.
or
One in 3,000,000 has a chance of becoming a human being.
or
By carving a Trumpkin.
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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
One; after reflecting in the twilight on the merit of the previous bulb.
or