Question 1
Statements:
Some athletes are architects.
All architects are pilots.
Conclusions:
I. All athletes are pilots.
II. Some athletes are not pilots.
Complementary Pair Analysis:
Conclusions I and II form a complementary pair:
- "All athletes are pilots" (A-type)
- "Some athletes are not pilots" (O-type)
These are opposite statements where at least one can be true.
Venn Diagram:
Step 1: "Some athletes are architects" → Partial overlap
Step 2: "All architects are pilots" → architects inside pilots
Step 3: The part of athletes overlapping with architects is definitely inside pilots
Step 4: But we DON'T know about the rest of athletes
Possible Cases:
Case 1: All of athletes inside pilots → Conclusion I true
Case 2: Some of athletes outside pilots → Conclusion II true
Either-Or Rule:
When conclusions form complementary pair "All" and "Some not", answer is "Either-Or".
Answer: Either conclusion I or II follows
Conclusions I and II form a complementary pair:
- "All athletes are pilots" (A-type)
- "Some athletes are not pilots" (O-type)
These are opposite statements where at least one can be true.
Venn Diagram:
Step 1: "Some athletes are architects" → Partial overlap
Step 2: "All architects are pilots" → architects inside pilots
Step 3: The part of athletes overlapping with architects is definitely inside pilots
Step 4: But we DON'T know about the rest of athletes
Possible Cases:
Case 1: All of athletes inside pilots → Conclusion I true
Case 2: Some of athletes outside pilots → Conclusion II true
Either-Or Rule:
When conclusions form complementary pair "All" and "Some not", answer is "Either-Or".
Answer: Either conclusion I or II follows