VOCABULARY OF PHILOSOPHY – CONVERSION

CONVERSION.—The transposition of the subject of a proposition into the place of the predicate, and of the predicate into the place of the subject. The proposition to be converted is called the convertend, and that into which it is converted the converse. Logical conversion is one species of Immediate Inference, the truth of the converse being inferred from the truth of the convertend by conversion. No term must be distributed in the converse which was undistributed in the convertend. It is of three kinds, viz., simple conversion, conversion per accidens or by limitation, and conversion by negation or contraposition.