Point out the logical fallacy made in the following argument: 'All Russians were revolutionaries. All anarchists were revolutionaries. That is why all anarchists were Russians.' Choose the correct answer from the options given below.

1.Fallacy of four terms

2.Fallacy of illicit process

3.Fallacy of undistributed middle

4.Fallacy of inductive premises

A1 and 2 only

B2 and 3 only

C3 only ✓ Correct

D3 and 4 only

Correct answer: (C) 3 only

Explanation

The defect is an undistributed middle term, so only statement 3 applies.

'Revolutionaries' is the middle term shared by both premises.

In each premise it stands as the predicate of a universal affirmative.

The predicate of an A proposition is undistributed, so the middle is never distributed.

A middle term distributed in neither premise cannot validly link the other terms.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.