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 Patient are Doctor. Some Doctor are Lawyer. No Teacher is a Lawyer. All Judge are Teacher. Conclusion: I. No Judge is Lawyer. II. Some Patient are Lawyer. III. Some Doctor are not Judge.Solution
All Judge are Teacher (A) + No Teacher is a Lawyer (E) → No Judge is a Lawyer (E). Hence conclusion I follows. Some Patient are Doctor (I) + Some Doctor are Lawyer (I) → No conclusion. Hence conclusion II does not follow. All Judge are Teacher (A) + No Teacher is a Lawyer (E) → No Judge is a Lawyer (E) + [Some Doctor are Lawyer (I) → Conversion] → Some Lawyer are Doctor (I) → Some Doctor are not Judge. (O*). Hence conclusion III follows.
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