Contraposition is valid Scrabble Word

Is contraposition a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is contraposition valid Words with Friends?
Words with Friends YES

14 letters word
18 points in Scrabble
22 points in WWF

Definitions for CONTRAPOSITION in dictionary:

NOUN:

opposition; contrast
conversion of a proposition from all A is B to all not-B is not-A.
A placing over against; opposite position.
A so-called immediate inference which consists in denying the original subject of the contradictory predicate; e.g.: Every S is P; therefore, no Not-P is S.

OTHER DEFINITIONS:

the relationship between two propositions when the subject and predicate of one are respectively the negation of the predicate and the negation of the subject of the other

Words related to CONTRAPOSITION

contrapositions19

Words that contain CONTRAPOSITION

contrapositions19

Similar words containing NTRAPOSI without suffix tion and without prefix co

contrapositive21 contrapositions19 contrapositives22

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