allery'બધા S એ P છે'નું પ્રતિવર્તિત (obverse) વિધાન શું છે?
Aકેટલાક S એ બિન-P છે
Bકોઈ S એ P નથી
Cબધા બિન-S એ P છે
Dકોઈ S એ બિન-P નથી
Answer & Solution
Correct answer: D. કોઈ S એ બિન-P નથી
પ્રતિવર્તન ગુણને બદલે છે અને વિધેયને તેના પૂરક પદ સાથે બદલે છે, જેનાથી 'કોઈ S એ બિન-P નથી' મળે છે.
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