Statements: 1. All men are mortal. 2. Socrates is a man. Conclusions: I. Socrates is mortal. II. All mortals are men. Which conclusion(s) logically follow? MCQ with Answer and Explanation
Statements:
1. All men are mortal.
2. Socrates is a man.
Conclusions:
I. Socrates is mortal.
II. All mortals are men.
Which conclusion(s) logically follow?
A. Neither I nor II follows
B. Only conclusion I follows
C. Both I and II follow
D. Only conclusion II follows
Answer: Option B
Solution (By JKSSB Mock Tests)
Since Socrates falls within the category of 'man', and the entire category of 'man' falls within 'mortal', Socrates must be mortal (I follows). Not all mortals are men (e.g., animals), which makes II false.
Statements:
1. All rivers are lakes.
2. All lakes are oceans.
Conclusions:
I. Some oceans are rivers.
II. No ocean is a river.
Which conclusion(s) logically follow?
Explanation:
Because rivers -> lakes -> oceans, all rivers are oceans. If all rivers are oceans, then some oceans must be rivers. Therefore, Conclusion I is definitely true and Conclusion II is definitely false.
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