Question
In the question below some statements are given followed by three conclusions I, II and
III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusion definitely follows from the given statements, disregarding commonly known facts. Statements: All Papers are Pens. Some Pens are Books. No Book is Box. Conclusions:
I. Some Pens are not Boxes.
II. Some Boxes are Papers.
III. All Pens are Papers.
Solution
Some Pens are Books (I) + No Book is Box (E) → Some Pens are not Boxes (O). Hence conclusion I follows. All Papers are Pens (A) + Some Pens are Books (I) → No conclusion. Hence conclusion II does not follow. All Papers are Pens (A) → Conversion → Some Pens are Papers (I). Hence conclusion III does not follow.
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