Which one of the following propositions is logically equivalent to the proposition Some attorneys are logicians?

ASome logicians are not attorneys

BSome attorneys are non-logicians

CSome logicians are attorneys ✓ Correct

DSome non-logicians are not non-attorneys

Correct answer: (C) Some logicians are attorneys

Explanation

Some logicians are attorneys carries exactly the same meaning as the original I proposition.

The given statement is a particular affirmative: Some attorneys are logicians.

A particular affirmative I proposition validly converts by simple conversion.

In conversion the subject and predicate terms are interchanged with no change in quantity or quality.

So Some attorneys are logicians and Some logicians are attorneys are logically equivalent.

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