5Dec19 FS Q12
0. Which one of the following is not a part of immediate deductive inference?
- Option : C
- Explanation : There are two kinds of deductive inference in logic: immediate and mediated inferences. An immediate inference involves an argument consisting of two propositions: one premise and a conclusion; whereas mediated inferences or syllogisms have an argument consisting of three propositions: two premises and a conclusion (with three terms). Immediate inference has three additional varieties: (i) Conversion is the inference in which the subject and predicate are interchanged; (ii) Obversion is the inference in which the quality of the proposition is changed and the predicate is interchanged with its complement; and, (iii) Contraposition is the inference in which the subject is interchanged with the complement of the predicate and the predicate is interchanged with the complement of the subject.
