UGC NET Questions (Paper – 1)

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U6 – Logical Reasoning and Indian Logic
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Concepts: conversion of propositions logical equivalence obversion operation quality and quantity UGC NET logical reasoning

Q: Which of the following statements about conversion and obversion of categorical propositions are correct?

(A) Conversion interchanges the subject and predicate terms of a categorical proposition;
(B) A and O propositions in traditional logic are not simply convertible, but E and I propositions are;
(C) Obversion changes the quality (affirmative/negative) and replaces the predicate with its complement;
(D) The obverse of “All S are P” is “No S are non-P”, which is logically equivalent to the original;
(E) In UGC NET questions, knowledge of conversion and obversion helps in deciding whether two statements are equivalent;
Choose the correct answer from the options given below:

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