Direction: The question contains four arguments of three sentences each. Choose the set in which the third statement is a logical conclusion of the first two. A. No sun is not white. All moon is sun. All moon is white. B. All windows are open. No open space is allocated. All window is closed space.

Question

Direction: The question contains four arguments of three sentences each. Choose the set in which the third statement is a logical conclusion of the first two. A. No sun is not white. All moon is sun. All moon is white. B. All windows are open. No open space is allocated. All window is closed space. C. No German can fire. All Americans bombard. Both, Germans and Americans can fight. D. No X is Z. No Z is Y. No X is Y.

Accepted Answer

A only — If no sun is not white, it implies that all sun is white. All moon is sun, so it follows that all moon is white. B and C lead to undefined conclusions. In D, there is a possibility that X and Y sets can intersect.

CAT 1998 — DILR Question 8

Answer & solution