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[koun-ter-ig-zam-puh l, -zahm-] /ˈkaʊn tər ɪgˌzæm pəl, -ˌzɑm-/
an example that refutes an assertion or claim.
1955-60; counter- + example Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for counterexample
  • Where people are involved, you can find a counterexample to any statement made.
  • My counterexample above demonstrates this pretty clearly.
  • Economics does not provide the necessary objective evidence for proof by counterexample.
  • In fact, it strikes me that marriage provides a great counterexample.
  • Lastly, it's rather ironic that some comments choose to cite oil as some sort of counterexample to the rare earths situation.
  • Well, real life provides a great counterexample anyway.
  • He's probably the counterexample to the theory that nobody learns anything.
  • All it takes is one counterexample to disprove a negative.
  • The second thought was of the obvious counterexample.
  • counterexample: someone asks a really basic question.
British Dictionary definitions for counterexample


an example or fact that is inconsistent with a hypothesis and may be used in argument against it
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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