Question
In the question below some statements are given
followed by three conclusions I, II and III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusion definitely follows from the given statements, disregarding commonly known facts. Statements: Some Dogs are Rats. No Dog is Cat. All Cats are Tigers. Conclusions: I. Some Rats are not Tigers. II. Some Cats are Dogs. III. Some Cats are not Rats.Solution
No Dog is Cat (E) + All Cats are Tigers (A) → Some Tigers are not Dogs (O*) + Some Dogs are Rats (I) → No conclusion. Hence conclusion I does not follow. No Dog is Cat (E) → Conversion → Some Cats are not Dogs (O). Hence conclusion II does not follow. Some Dogs are Rats (I) → Conversion → Some Rats are Dogs (I) + No Dog is Cat (E) → Some Rats are not Cat (O). Hence conclusion III does not follow.
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