If the statement No animals are fishes is given as false, then which of the following statements can be immediately inferred to be true?

1.All fishes are animals

2.Some animals are not fishes

3.All animals are fishes

4.Some animals are fishes

A2 & 4 only

B1, 3 & 4 only

C3 & 4 only

D4 only ✓ Correct

Correct answer: (D) 4 only

Explanation

Some animals are fishes is the only statement that can be inferred true.

No animals are fishes is the E proposition declared false.

The contradictory of E is the particular affirmative I.

So a false E makes Some animals are fishes true.

The remaining forms stay undetermined and cannot be affirmed true.

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