Barber paradox
Colloquial version of Russell's paradox / From Wikipedia, the free encyclopedia
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This article is about a paradox of self-reference. For an unrelated paradox in the theory of logical conditionals with a similar name, introduced by Lewis Carroll, see Barbershop paradox.
"Who shaves the barber" redirects here. For the Fargo episode, see Who Shaves the Barber?
The barber paradox is a puzzle derived from Russell's paradox. It was used by Bertrand Russell as an illustration of the paradox, though he attributes it to an unnamed person who suggested it to him.[1] The puzzle shows that an apparently plausible scenario is logically impossible. Specifically, it describes a barber who is defined such that he both shaves himself and does not shave himself, which implies that no such barber exists.[2][3]
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