Paper 1 · Logical Reasoning
UGC NET December 2023 (11.12.2023) Shift-I
Which of the following statements is equivalent to the statement 'Some non-realists are not non-philosophers'?
ASome philosophers are not realists ✓ Correct
BNo philosophers are realists
CSome realists are philosophers
DSome philosophers are realists
Correct answer: (A) Some philosophers are not realists — The equivalent statement is some philosophers are not realists, so that is the answer.
Explanation
★The equivalent statement is some philosophers are not realists, so that is the answer.
★The original is some non-realists are not non-philosophers, a type O statement.
★Applying double negation to both terms preserves its meaning.
★Not non-philosophers becomes philosophers and non-realists becomes not realists.
★So it restates as some philosophers are not realists.
★The other options change the logical type and are not equivalent.
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