contrapositive

As nouns the difference between contrapositive and null

is that contrapositive is the inverse of the converse of a given proposition while null is a non-existent or empty value or set of values.

As an adjective null is

having no validity, "null and void.

As a verb null is

to nullify; to annul.

In lang=en terms the difference between contradictory and contrapositive

is that contradictory is any of a pair of propositions, that cannot both be true or both be false while contrapositive is the inverse of the converse of a given proposition.

As an adjective contradictory

is that contradicts something, such as an argument.

As a noun contrapositive

is (logic) the inverse of the converse of a given proposition.

As an adjective contradistinct is

distinguished by opposite qualities.

As nouns the difference between opposite and contrapositive

is that opposite is something opposite or contrary to another while contrapositive is (logic) the inverse of the converse of a given proposition.

As an adjective opposite

is located directly across from something else, or from each other.

As an adverb opposite

is in an opposite position.

As a preposition opposite

is facing, or across from.

is likely misspelled.

has no English definition.

As a noun contrapositive

is the inverse of the converse of a given proposition.

As nouns the difference between taxonomy and contrapositive

is that taxonomy is the science or the technique used to make a classification while contrapositive is (logic) the inverse of the converse of a given proposition.

In logic|lang=en terms the difference between obverse and contrapositive

is that obverse is (logic) the double negative of a statement eg all men are mortal'' => ''no man is immortal while contrapositive is (logic) the inverse of the converse of a given proposition.

As nouns the difference between obverse and contrapositive

is that obverse is the heads side of a coin, or the side of a medal or badge that has the principal design while contrapositive is (logic) the inverse of the converse of a given proposition.

As an adjective obverse

is turned or facing toward the observer.