Which of the following statements are logically equivalent?

1.Some animals are not carnivorous organisms

2.Some animals are not non-carnivorous organisms

3.Some non-carnivorous organisms are not non-animals

4.Some animals are non-carnivorous organisms

A1 & 4 only

B1, 2 & 4 only

C1, 3 & 4 only ✓ Correct

D2 & 3 only

Correct answer: (C) 1, 3 & 4 only

Explanation

Statements 1, 3 and 4 are logically equivalent.

Base 1 is the O "Some animals are not carnivorous organisms".

Its obversion gives 4, "Some animals are non-carnivorous organisms".

Its contraposition gives 3, "Some non-carnivorous organisms are not non-animals".

Statement 2 obverts to "Some animals are carnivorous", an I, and does not match.

Obversion and contraposition on the O tie 1, 3 and 4 together.

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