American Heritage® Dictionary of the English Language, Fourth Edition
- 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.
Century Dictionary and Cyclopedia
- Of, pertaining to, or produced by contraposition: as, contrapositive propositions; contrapositive conversion.
- n. In logic, a contrapositive proposition.
“I'm leaving out some steps here (which students always appropriately resent), but the above is all of a piece with something called the "contrapositive".”
“The '' 'contrapositive' '' of a statement of the form "A implies B" is the [[logic]] ally equivalent statement "not-B implies not-A.”
“We can also see this in the contrapositive: having more than one sexual partner is by definition nonmonogamous.”
“A natural experiment that is the contrapositive to Korea would be Vietnam.”
“The contrapositive of this is that if you are not a U.S. national (e.g. you lose your nationality through the operation of the law) then it follows you are also not a citizen.”
“(If Messiahs are in the habit of denying themselves, surely the contrapositive is true.)”
“But mythological creatures also performed a second, often contrapositive, argumentative function; commentators who rejected evolution regularly did so by dismissing these creatures.”
“If Messiahs are in the habit of denying themselves, surely the contrapositive is true.”
“The contrapositive of this is that if you are not a U.S. national e.g. you lose your nationality through the operation of the law then it follows you are also not a citizen.”
“Why not look as well to where such contrapositive energy has always been found in literature: as a function of literary representing per se, the writing itself?”
These user-created lists contain the word ‘contrapositive’.
List of words that contain the letter string *trap*. Some are obvious and apparent, such as trapezoid, while others are a bit less apparent, such as contrapuntist, ultraphysical, and intraperitoneal.
Words for students of introductory logic
words used in Logic
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