Paper 1 · Logical Reasoning
UGC NET December 2021 June 2022 (12.07.2022) Shift-II
If the statement 'Some animals are not ferocious' is given as true, then which of the following could be immediately inferred from it?
- 'All animals are ferocious' is undetermined
- 'Some animals are ferocious' is false
- 'No animals are ferocious' is undetermined
- 'All animals are ferocious' is false
A3 and 4 only ✓ Correct
B2 and 4 only
C2, 3 and 4 only
D1, 2 and 3 only
Correct answer: (A) 3 and 4 only — The answer is 3 and 4.
Explanation
★The answer is 3 and 4.
★If 'Some animals are not ferocious' is true, its contradictory 'All animals are ferocious' is false, which is item 4.
★The truth of this particular negative leaves 'No animals are ferocious' undetermined, which is item 3.
★It does not fix the truth of 'Some animals are ferocious', so item 2 is not settled and is excluded.
★The 'All animals are ferocious' proposition is determined as false, not undetermined, so item 1 is excluded.
★So the immediate inferences are the third and fourth.
★So the answer is 3 and 4.
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