Q. A Statement followed by Conclusion-I and Conclusion-II is given below. You have to take the Statement to be true even if it seems to be at variance from the commonly known facts. Read all Conclusions and then decide which of the given Conclusion(s) logically follows/follow from the Statement, disregarding the commonly known facts.
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
From the statement “Some radios are mobiles,” we can infer that there is a possibility that some radios are also computers since all mobiles are computers. However, we cannot conclude with certainty that some radios are watches.
From the statement “Some computers are watches,” we can infer that there is a possibility that some mobiles are also watches since all mobiles are computers. However, we cannot conclude with certainty that some mobiles are watches.
Therefore, neither Conclusion-I nor Conclusion-II logically follows from the given statement.