In each of the questions below are given two statements followed by three conclusions numbered I, II and III. You have to take the given statements to be true even if they seem to be variance from commonly-known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly-known facts.
Statements:
No train is star
Some stars are men.
Conclusions:
I. Some men are trains
II. No men is train
III. All men are stars
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 conclusion III. Since we found an exception, the conclusion is not true in "every" case. Thus it is not implied.
Irrespective of the diagram, conclusions I and II 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".
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