ABSTRACT

In the first place, we should notice that the lines of demarcation between what remains valid and what is no longer valid under this interpretation correspond to distinctions which are already drawn in traditional syllogistic itself. Thus, traditional syllogistic distinguishes between weakened syllogisms, strengthened syllogisms, and syllogisms which are neither. Secondly, the items in the traditional scheme which become invalid under Interpretation 1 consist of all those cases, and only those cases, in which a particular proposition is inferred from one or more universal propositions.