alleryसमकालीन तर्कशास्त्रात, जेव्हा एकही A नसतो, तेव्हा 'सर्व A हे B आहेत' हे सत्य असू शकते का?
Aकेवळ जर ते अंशव्यापी असेल
Bकेवळ जर B रिक्त असेल
Cनाही, ते असत्यच असले पाहिजे
Dहोय, ते सत्य असू शकते
Answer & Solution
Correct answer: D. होय, ते सत्य असू शकते
आधुनिक तर्कशास्त्र सर्वव्यापी विधानांसाठी अस्तित्वविषयक महत्त्व नाकारते, त्यामुळे रिक्त वर्गासाठी ती पोकळपणे (vacuously) सत्य ठरतात.
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