Instructions

In each of the question below are given three statements followed by three conclusions numbered I, II III You have to take the given statements to be true even if they seem to be at variance from commonly known facts Read all the conclusions and then decide which of the given conclusions logically follows from three given statements disregarding commonly known facts. Then decide which of the answer 1),2),3),4) and 5) is correct answer and indicate it on the answersheet.

Question 73

# Statements:Some boxes are walls. No wall is road. All roads are rivers.Conclusions:I.Some rivers are walls. II.Some roads are boxes. III.No wall is river.

Solution

We use elimination to find an exception to the generality of the conclusions. Thus we prove they are not implied. The diagram above satisfies all the statements but contradicts the conclusion II. Since we found an exception, the conclusion is not not true in "every" case. Thus it is not implied.

Irrespective of the diagram, conclusions I and III are universally complimentary ie. one of the two always has to be implied but both can't be true at the same time. Hence we use "either" and "or".