Arrow's paradox, also called Arrow's impossibility theorem or the general possibility theorem, states that perfect democratic voting is impossible, not just in practice but also in principle.
See alsoSocial Choice Theory, Voting Paradoxes
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ReferencesErickson, G. W. and Fossa, J. A. Dictionary of Paradox. Lanham, MD: University Press of America, pp. 13-15, 1998.Gardner, M. Time Travel and Other Mathematical Bewilderments. New York: W. H. Freeman, p. 56, 1988.
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Weisstein, Eric W. "Arrow's Paradox." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ArrowsParadox.html