EDUCATION UGC NET
COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Contrary
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Sub-contrary
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Contradictory
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Sub-alteration
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Detailed explanation-1: -Two universal categorical propositions with the same subject and predicate are contraries if one is an affirmation and the other a denial. Contraries are of the form “Every S is P” and “No S is P.” Contraries may both be false but cannot both be true.
Detailed explanation-2: -Sub alternation: Sub alternation opposition is the relation between two proposition having the same subject and predicate but differing in quantity only. The relation between universal negative (E) and particular negative (O) is called sub alternation.
Detailed explanation-3: -Opposition: Occurs when two standard-form categorical propositions refer to the same subject and predicate classes, but differ in quality, quantity, or both.
Detailed explanation-4: -Two categorical propositions are contradictories if they are opposed in both quantity and quality; i.e., if one is universal (“every”) and the other particular (“some”) and one an affirmation and the other a denial. For example, “Every S is P” and “Some S is not P” are contradictories.
Detailed explanation-5: -Two propositions are contradictory iff they cannot both be true and they cannot both be false.