contrapositive
[ kon-truh-poz-i-tiv ]
/ ˌkɒn trəˈpɒz ɪ tɪv /
adjective
of or relating to contraposition.
noun
a contrapositive statement of a proposition.
QUIZZES
IT’S A WORD OF THE DAY QUIZ BONANZA!
This windfall of words will make you rich with knowledge. Mine your memory on the words from July 27 to August 2!
Question 1 of 7
What does "scattergood" mean?
a person who acts as though he or she knows everything and who dismisses the opinions, comments, or suggestions of others.
a person who spends possessions or money extravagantly or wastefully; spendthrift.
a well-intentioned but naive and often ineffectual social or political reformer.
TAKE THE QUIZ TO FIND OUTOrigin of contrapositive
First recorded in 1855–60; contraposit(ion) + -ive
Words nearby contrapositive
contraoctave, contraorbital, contraplete, contrapose, contraposition, contrapositive, contrapposto, contraption, contrapuntal, contrapuntist, contrarian
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for contrapositive
For a Disjunctive in I., of course, there is no Contrapositive.
Logic|Carveth ReadThere is an apparent exception to this when the real Middle in an argument is a contrapositive term, not-M.
Logic, Inductive and Deductive|William MintoIn the case of the I proposition the contrapositive is impossible, as infringing the main rule of conversion.
Every positive in thought has a contrapositive, and the positive and contrapositive are of the same kind.
Logic, Inductive and Deductive|William Minto
British Dictionary definitions for contrapositive
contrapositive
/ (ˌkɒntrəˈpɒzɪtɪv) /
adjective
placed opposite or against
noun
logic
- a conditional statement derived from another by negating and interchanging antecedent and consequent
- a categorial proposition obtained from another, esp validly, by any of a number of operations including negation, transferring the terms, changing their quality, and also possibly weakening from universal to particular
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