Difficulty: Easy
Correct Answer: Only Conclusion II follows
Explanation:
Introduction / Context:
The problem pairs a universal inclusion with an existential statement to test whether you can derive a necessary existential consequence while rejecting an overgeneralized universal converse.
Given Data / Assumptions:
Concept / Approach:
From the existence of at least one man who is a stenographer, and the fact that all stenographers are lazy, it follows that some men are lazy. However, claiming that all lazy people are men reverses and enlarges the set relation without support.
Step-by-Step Solution:
Verification / Alternative check:
Construct a world with lazy students, lazy women, and lazy men; the premises remain true, but not all lazy people are men. This shows I is not necessary.
Why Other Options Are Wrong:
Common Pitfalls:
Assuming that a subset relation can be flipped (converse error) or that one example proves a universal claim.
Final Answer:
Only Conclusion II follows.
Discussion & Comments