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Please accept my resignation. I don't want to belong to any club that will accept me as a member.
—Groucho Marx (1895-1977)

A paradox is a statement that seems to lead to a logical self-contradiction, or to a situation that contradicts common intuition. The word "paradox" comes from the Greek para ("beyond") and doxa ("opinion" or "belief"). The identification of a paradox based on seemingly simple and reasonable concepts has often led to significant advances in science, philosophy, and mathematics.

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