Definition of Contrapositive

1. Noun. (logic) the inverse of the converse of a given proposition ¹

¹ Source: wiktionary.com

Definition of Contrapositive

1. [n -S]

Lexicographical Neighbors of Contrapositive

contranatural
contransformation
contransmagnificandjewbangtantiality
contranym
contranyms
contraoctave
contraoctaves
contraoriented
contraparallelogram
contraparallelograms
contraplex
contrapolar
contraposition
contrapositions
contrapositive (current term)
contrapositives
contrapposto
contrapsin
contraption
contraptions
contrapuntal
contrapuntally
contrapuntist
contrapuntists
contraremonstrant
contraremonstrants
contrarian
contrarianism
contrarians

Literary usage of Contrapositive

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Principles of Science: A Treatise on Logic and Scientific Method by William Stanley Jevons (1877)
"We might similarly apply the contrapositive in many other instances. Take the argument, " All fixed stars are self-luminous ; but some of the heavenly ..."

2. An Introductory Logic by James Edwin Creighton (1909)
"The form here derived, the converse of the obverse, has usually been denned as the contrapositive of a given proposition, and we have so far followed this ..."

3. The Substitution of Similars: The True Principle of Reasoning, Derived from by William Stanley Jevons (1869)
"The new proposition thus obtained may be called the contrapositive of the one from which it was derived, this being a name long applied to a similar ..."

4. An Elementary Handbook of Logic by John Joseph Toohey (1918)
"Partial contrapositive Some non-voters are Americans. ... Again, the partial contrapositive and the contrapositive of All S is P, being both universal, ..."

5. Studies and Exercises in Formal Logic: Including a Generalisation of Logical by John Neville Keynes (1887)
"It should be observed that any proposition and its full contrapositive are equivalent to one another; in other words, we can pass back from a contra ..."

6. Logic, Inductive and Deductive: An Introduction to Scientific Method by Adam Leroy Jones (1909)
"In the contrapositive the subject is the opposite of the original predicate, the predicate is the original subject, and the quality of the proposition is ..."

7. A Manual of Logic by James Welton (1896)
"[Obverse] - - • [A] • [Every lazy person ii undeserving of success.] contrapositive • - I - Some people undeserving of success are lazy, ..."

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