A man of Seville is shaved by the Barber of Seville iff the man does not shave himself. Does the barber shave himself? This pseudoparadox was proposed by Bertrand Russell.
Barber Paradox
See also
Pseudoparadox, Russell's AntinomyExplore with Wolfram|Alpha
References
Curry, H. B. Foundations of Mathematical Logic. New York: Dover, pp. 4-5, 1977.Erickson, G. W. and Fossa, J. A. Dictionary of Paradox. Lanham, MD: University Press of America, pp. 17-18, 1998.Hoffman, P. The Man Who Loved Only Numbers: The Story of Paul Erdős and the Search for Mathematical Truth. New York: Hyperion, p. 116, 1998.Referenced on Wolfram|Alpha
Barber ParadoxCite this as:
Weisstein, Eric W. "Barber Paradox." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/BarberParadox.html