Question
Three statements are given followed by two conclusions
numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: All Lockers are Keys. Some Keys are Doors. All Doors are Windows. Conclusions: I. Some Keys are Windows. II. Some Lockers are Doors.Solution
Some Keys are Doors (I) + All Doors are Windows (A) → Some Keys are Windows (I). Hence conclusion I follows. All Lockers are Keys (A) + Some Keys are Doors (I) → No conclusion. Hence conclusion II does not follow.
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