Which of the following statements is logically equivalent to the statement 'No cats are non-feline'?

ANo felines are cats

BAll non-cats are feline

CAll cats are feline ✓ Correct

DAll felines are cats

Correct answer: (C) All cats are feline

Explanation

The equivalent is 'All cats are feline', reached by obversion.

The given proposition is E: No cats are non-feline.

Obverting an E changes it to an A and replaces the predicate by its complement.

The complement of 'non-feline' is 'feline'.

This yields 'All cats are feline', logically equivalent to the original.

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