CONVERSION

In Logic, a proposition is s.iid to be converted when the terms are so transposed that the submade the predicate, and vice vers a. All logical conversion is illative; i.e. the truth of the converse follows (ram that of the original. Conversion is either -'simple"or " per accidens." Universal negatives (denoted by the sig a B)aad particular affirmatives (l)can be converted simply, retaining both quantity and Duality: thus, '• No nan is a rebel;" " No rebel is a virtuous man." Conversion per arcidens changes either quantity orquali- (v. I niversal affirmatives (A) are converted by changing the quantity; as, " All oaks are tn-es;" " Some trees are Dftka." Particular negatives (O) by changing the quality, considering the negative as attached to the predicate In the copula: ifaa proposition is thu a changed Into i.— "Borne poets are aot learned:" ''Some not learned I) men are poets." See Proposition. [s. 295]