Statement: Some radios are mobiles. All mobiles are computers. Some computers are watches.
Conclusion-I: Certainly some radios are watches.
Conclusion-II: Certainly some mobiles are watches.
Which one of the following is correct?
(a) Only Conclusion-I
(b) Only Conclusion-II
(c) Both Conclusion-I and Conclusion-II
(d) Neither Conclusion-I nor Conclusion-II
Correct Answer: (d) Neither Conclusion-I nor Conclusion-II
Question from UPSC Prelims 2021 CSAT Paper
Explanation :
Relations between radios, mobiles, computers, and watches
Given statements:
1. Some radios are mobiles
2. All mobiles are computers
3. Some computers are watches
Analysis of conclusions:
Conclusion I: “Some radios are watches”
– We can only say some radios are computers
– We can’t establish a definite connection between radios and watches
– Not valid
Conclusion II: “Some mobiles are watches”
– All mobiles are computers
– But only some computers are watches
– No definite connection between mobiles and watches
– Not valid
Answer: (d) Neither Conclusion-I nor Conclusion-II follows
