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UPSC 1995: Examine the following statements: I. All children are inquisitive. II. Some children are inquisitive. III. No children are inquisitive. IV. Some children are not inquisitive. Among these statements, the two statements which cannot both be true simultaneously but can both be false would be
(a)I and III
(b)I and IV
(c)II and III
(d)III and IV
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Not attemptedCorrect Answer: (a) I and III
The correct answer is (a) I and III. In classical logic, 'All children are inquisitive' (universal affirmative) and 'No children are inquisitive' (universal negative) are contraries — they cannot both be true at the same time, but they can both be false (when some children are inquisitive and some are not).
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What is the correct answer to this UPSC 1995 Science & Technology question?▼
The correct answer is option (a): I and III. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Logical Reasoning question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1995, GS Paper 1, as Question 82. It falls under Science & Technology > Logical Reasoning.
What is the difficulty level of this UPSC question?▼
This question is rated "medium". It is a challenging question that demands deep subject knowledge and analytical thinking.
How many UPSC Prelims questions have been asked from Logical Reasoning?▼
UPSC has asked 1 questions from Logical Reasoning (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.