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Russell's paradox

noun

Mathematics.
  1. a paradox of set theory in which an object is defined in terms of a class of objects that contains the object being defined, resulting in a logical contradiction.


Russell's paradox

noun

  1. logic the paradox discovered by Bertrand Russell in the work of Gottlob Frege, that the class of all classes that are not members of themselves is a member of itself only if it is not, and is not only if it is. This undermines the notion of an all-inclusive universal class
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of Russell's paradox1

First recorded in 1920–25; first proposed by Bertrand Russell
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Example Sentences

Examples have not been reviewed.

However, the hole in logic, called Russell’s paradox, remained open.

From

Even if you could, you’d still be stuck with Russell’s paradox.

From

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