Conversion is the inference in which the subject and predicate are interchanged. In modern logic it is only valid for the E and I propositions. The valid converse is logically equivalent to the original proposition.

What is the conversion of a proposition?

Conversion is a concept in traditional logic referring to a "type of immediate inference in which from a given proposition another proposition is inferred which has as its subject the predicate of the original proposition and as its predicate the subject of the original proposition (the quality of the proposition being ...

What are the rules of conversion in logic?

A proposition is said to be "converted" when the subject and the predicate change places; the original proposition is the "convertend," the new one the "converse." The chief rule governing conversion is that no term which was not distributed' in the convertend may be distributed in the converse; nor may the quality of ...