Conversion by contraposition may be said to rest on the following principle-

As applied to conjunctive propositions conversion by contraposition assumes the following forms-

Nor can conversion by contraposition be applied at all to I.

But what is this but an immediate inference by contraposition, coming under the formula

As applied to disjunctive propositions conversion by contraposition consists simply in transposing the two alternatives.

Conversion by contraposition cannot be applied to the ordinary E proposition except by limitation (§ 526).

This statement contemplates conversion by contraposition only in reference to the A proposition, to which the process has hitherto been confined.

Take any universal affirmative proposition; convert it by obversion (contraposition); attach the negative particle to the predicate, and again convert.

Conversion by contraposition may be complicated in appearance by the occurrence of a negative term in the subject or predicate or both, e.g.

May it be that consciousness and its extended support are two powers in contraposition, the one growing at the expense of the other?

Conversion, 479. of complex propositions, 709. by contraposition, 516. illative, 481. by negation, 504. per accidens, 487. simple, 486. rules of, 482.

Complex Proposition, 209. conversion of, 709. conversion by contraposition of, 728. conversion by negation of, 721. divided into conjunctive and disjunctive, 214. permutation of, 718.

(3) Conversion by negation involves only two steps of immediate inference: conversion by contraposition three.

Conversion by contraposition may be said to rest on the following principle-

As applied to conjunctive propositions conversion by contraposition assumes the following forms-

Nor can conversion by contraposition be applied at all to I.