Paper 1 · Logical Reasoning
Which relation holds between two propositions having the same subject and predicate but differing in both quality and quantity?
AContrary opposition
BContradictory opposition ✓ Correct
CSub-alternation
DSub-contrary opposition
Correct answer: (B) Contradictory opposition — Differing in both quality and quantity gives contradictory opposition, so that is the answer.
Explanation
★Differing in both quality and quantity gives contradictory opposition, so that is the answer.
★The pairs A-O and E-I differ in both respects.
★Contradictories cannot both be true and cannot both be false.
★Exactly one of a contradictory pair is true and the other false.
★Contrary opposition, by contrast, differs in quality alone.
★So the answer is contradictory opposition.
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