Paper 1 · Logical Reasoning
UGC NET December 2023 (13.12.2023) Shift-I
Which of the following statements is logically equivalent to the statement 'No professors are materialists'?
ASome non-materialists are not non-professors
BSome professors are non-materialists
CAll professors are non-materialists ✓ Correct
DAll non-materialists are non-professors
Correct answer: (C) All professors are non-materialists — The equivalent statement is all professors are non-materialists, so that is the answer.
Explanation
★The equivalent statement is all professors are non-materialists, so that is the answer.
★No professors are materialists is a type E universal negative.
★By obversion it changes to a type A with a negated predicate.
★So it becomes all professors are non-materialists.
★Obversion keeps the same meaning while flipping quality and negating the predicate.
★The other options change the logical type and are not equivalent.
Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.
Shared by Mcqkart · via Mcqkart.in