Russell's paradox

noun

Rus·​sell's paradox

ˈrəsəlz-

: a paradox that discloses itself in forming a class of all classes that are not members of themselves and in observing that the question of whether it is true or false if this class is a member of itself can be answered both ways compare liar paradox, vicious circle principle

Word History

Etymology

after Bertrand Russell

First Known Use

1904, in the meaning defined above

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