Paper 1 · Logical Reasoning
UGC NET December 2022 (24.02.2023) Shift-II
Which of the following statements are so related that they cannot both be false, although they may both be true?
- All metals are gases
- Some metals are gases
- Some metals are not gases
- No metals are gases
A1 & 4 only
B2 & 3 only ✓ Correct
C1 & 2 only
D3 & 4 only
Correct answer: (B) 2 & 3 only — The subcontrary pair is Some metals are gases and Some metals are not gases, so the answer is 2 and 3.
Explanation
★The subcontrary pair is Some metals are gases and Some metals are not gases, so the answer is 2 and 3.
★Two subcontrary statements cannot both be false, though both can be true.
★Statement 2 is the particular affirmative, Some metals are gases.
★Statement 3 is the particular negative, Some metals are not gases.
★These two particulars are subcontraries.
★They cannot both be false at once, yet both can be true together.
★So the answer is items 2 and 3.
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