When subject and predicate of both the premises is same but they differ only in quantity, it is known as:
Subaltern
In the traditional Square of Opposition, two categorical propositions that share the same subject and the same predicate but differ only in quantity (one being universal and the other particular) while keeping the same quality are said to be in the relation of subalternation, and the pair is called subaltern.
For example, the universal affirmative 'All S are P' (A) and the particular affirmative 'Some S are P' (I) have the same subject S, the same predicate P and the same quality (affirmative), differing only in quantity (universal versus particular). This is precisely subalternation. The same holds for the universal negative 'No S is P' (E) and the particular negative 'Some S are not P' (O).
Contraries are two universal propositions that differ in quality, both cannot be true together. Sub-contraries are two particular propositions that differ in quality, both cannot be false together. Contradictories differ in both quantity and quality and cannot share the same truth value. Since the question specifies same subject and predicate differing only in quantity, the relation is subaltern.
Correct answer: Subaltern
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Important Questions from Classical Square of Opposition
Which of the following statements are so related that they can not both be true but could both be false?
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If the statement "Some animals are birds" is given as false then which of the following statements can be immediately inferred to be false?
Which of the following propositions can be directly inferred from the statement - "All mammals are four-legged animals?
Which of the following statements are contradictory to each other?
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Choose the most appropriate answer from the options given below:
