Question
Statements: Some children are parents. All
parents are infants. Some infants are adolescent. Conclusions: I. At least some adolescent are parents. II. All infants being parents is a possibility. III. Some infant are definitely children. IV. Some parents are adolescent. In each question below are given some statements followed by some conclusions numbered I, II, III and IV are given. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the given statements, disregarding commonly known facts.Solution
All parents are infants(A) + Some infants are adolescent(I) ⇒ No conclusion. Hence conclusion I and IV does not follow. All parents are infants(A) ⇒ Conversion ⇒ Some infants are parents(I) ⇒ Probable conclusion ⇒ All infants being parents is a possibility(A). Hence conclusion II follow. Some children are parents(I) + All parents are infants(A) ⇒ Some children are infants (I) ⇒ Conversion ⇒ Some infant are children(I). Hence conclusion III follows. ALTERNATE SOLUTION: Relevant Minimal Possibility: 
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