Question
In each question below are given three statements
followed by three conclusions numbered I, II and III. You have to take the two 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 three given statements, disregarding commonly known facts. Statements: All mammals are reptiles. All snakes are reptiles. All reptiles are amphibians. Conclusions: I. All mammals are amphibians. II. All snakes are amphibians. III. Some amphibians are mammals.Solution
All mammals are reptiles. (A) + All reptiles are amphibians(A) = All mammals are amphibians(A). Hence, conclusion I will follow. All snakes are reptiles (A) + All reptiles are amphibians(A) = All snakes are amphibians. Hence, conclusion II will also follow. All mammals are amphibians(A) ⇒ conversion ⇒ Some amphibians are mammal (I). Hence, conclusion III will also follow.
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