Delhi Police Constable practice question
Statements: All students are teachers. All teachers are engineers. Conclusions: I. All students are teachers II. No engineers are teachers. Which of the conclusions follow(s) from the statements?
From a Delhi Police Constable Reasoning practice set · Reasoning
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Correct answer: (A) Only conclusion I follows
Statements: All students are teachers. All teachers are engineers. Conclusion I: "All students are teachers." is forced by the given statements in every possible case consistent with them, so it definitely follows. Conclusion II: "No engineers are teachers." is true in some cases consistent with the statements but false in others (or never true), so it does not definitely follow. So: Only conclusion I follows.
हिंदी में प्रश्न
कथन: सभी छात्र, शिक्षक हैं। सभी शिक्षक, इंजीनियर हैं। निष्कर्ष: I. सभी छात्र, शिक्षक हैं II. कोई इंजीनियर, शिक्षक नहीं है। कथनों से कौन सा/से निष्कर्ष अनुसरण करता/करते है/हैं?
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सही उत्तर: (A) केवल निष्कर्ष I अनुसरण करता है
कथन: सभी छात्र, शिक्षक हैं। सभी शिक्षक, इंजीनियर हैं। निष्कर्ष I: दिए गए कथनों के अनुरूप हर संभावित स्थिति में "सभी छात्र, शिक्षक हैं।" सत्य है, इसलिए यह निश्चित रूप से अनुसरण करता है। निष्कर्ष II: "कोई इंजीनियर, शिक्षक नहीं है।" कथनों के अनुरूप कुछ स्थितियों में सत्य हो सकता है पर सभी में नहीं (या कभी नहीं), इसलिए यह निश्चित रूप से अनुसरण नहीं करता। अतः: केवल निष्कर्ष I अनुसरण करता है।
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