If 'Some men are violent' is given as false, which of the following could be immediately inferred from it?

1.'No men are violent' is undetermined

2.'Some men are not violent' is true

3.'No men are violent' is true

4.'All men are violent' is false

A2, 3 and 4 only ✓ Correct

B1, 2 and 4 only

C1 and 4 only

D1 and 3 only

Correct answer: (A) 2, 3 and 4 only

Explanation

With "Some men are violent" false, E and O are true and A is false, giving 2, 3 and 4.

I and E are contradictories, so a false I makes "No men are violent" true.

E then implies its subaltern, so "Some men are not violent" is true as well.

A stands above the false I as superaltern, so "All men are violent" is false.

Hence E true, O true and A false are the secured results.

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