Difficulty: Medium
Correct Answer: Neither I nor II follows
Explanation:
Given data
Concept/Approach
Sharing a common superset (Angels) does not force overlap between the two subsets. Particular conclusions about intersection need evidence of direct overlap, not merely co-membership of a larger set.
Step-by-step evaluation
1) DS ⊆ Angels (for some elements), and SW ⊆ Angels.2) DS and SW might be disjoint subsets inside Angels.3) Therefore neither (I) nor (II) is necessary.Verification/Alternative
Countermodel: Angels = {a1, a2}, DS = {a1}, SW = {a2}. Premises true; both conclusions false.
Common pitfalls
Final Answer
Neither I nor II follows.
Discussion & Comments