Difficulty: Easy
Correct Answer: Only II follows
Explanation:
Introduction / Context:
An existential (“some”) combined with a universal inclusion often yields a guaranteed “some” about the superset.
Given Data / Assumptions:
Concept / Approach:
The particular witness that is both Phone and Watch must also be a Gun. Hence “Some guns are phones” (II) is necessary. Claim (I) reverses the universal and is not supported.
Step-by-Step Solution:
Pick x ∈ Phone ∩ Watch (exists).Since Watch ⊆ Gun, x ∈ Gun.Therefore x ∈ Phone ∩ Gun, proving II.
Verification / Alternative check:
No model can satisfy the premises and negate II, because the existential passes through the inclusion.
Why Other Options Are Wrong:
(I) claims Gun ⊆ Watch, which is not given.
Common Pitfalls:
Illicit conversion of universals.
Final Answer:
Only II follows.
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