Statements: 1. No cat is a dog. 2. No dog is a rat. Conclusions: I. No cat is a rat. II. Some cats are rats. Which conclusion(s) logically follow? MCQ with Answer and Explanation
Statements:
1. No cat is a dog.
2. No dog is a rat.
Conclusions:
I. No cat is a rat.
II. Some cats are rats.
Which conclusion(s) logically follow?
A. Neither I nor II follows
B. Either I or II follows
C. Only conclusion I follows
D. Only conclusion II follows
Answer: Option B
Solution (By JKSSB Mock Tests)
When there are two negative statements, no definitive positive or negative relationship can be established between the subject of the first and the predicate of the second (cat and rat). Since I and II form a complementary pair covering all possibilities, either I or II must be true.
Statement: The train is running late by 2 hours. Conclusions: I. It will reach the destination at the scheduled time. II. Passengers will have to wait.
Explanation:
Neither necessarily follows. A professional dancer may be self-taught; not all professional dancers perform on stage (some teach). So, neither is certain.
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