Question
Read the given statements and conclusion carefully.
Assuming the information given in the statement is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: Some Plant are Flower. Some Flower are Herb. No Shrub is a Herb. All Nail are Shrub. Conclusion: I. No Nail is Herb. II. Some Plant are Herb. III. Some Flower are not Nail.Solution
All Nail are Shrub (A) + No Shrub is a Herb (E) → No Nail is a Herb (E). Hence conclusion I follows. Some Plant are Flower (I) + Some Flower are Herb (I) → No conclusion. Hence conclusion II does not follow. All Nail are Shrub (A) + No Shrub is a Herb (E) → No Nail is a Herb (E) + [Some Flower are Herb (I) → Conversion] → Some Herb are Flower (I) → Some Flower are not Nail. (O*). Hence conclusion III follows.
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