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contrapositive

 - 2 dictionary results

con⋅tra⋅pos⋅i⋅tive

  [kon-truh-poz-i-tiv] Logic.
Use contrapositive in a Sentence
–adjective
1. of or pertaining to contraposition.
–noun
2. a contrapositive statement of a proposition.
Origin:
1855–60; contraposit(ion) + -ive
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To contrapositive
con·tra·pos·i·tive   (kŏn'trə-pŏz'ĭ-tĭv)   
n.   Logic
A proposition derived by negating and permuting the terms of another, equivalent proposition; for example, All not-Y is not-X is the contrapositive of All X is Y.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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