Subalternation is a type of immediate inference that occurs within the framework of categorical logic, where the truth of a universal proposition guarantees the truth of its corresponding particular proposition, but not vice versa. It demonstrates a relationship between statements in the Square of Opposition, particularly showing how the truth of an A proposition (universal affirmative) leads to the truth of an I proposition (particular affirmative), while the falsity of the particular does not imply the falsity of the universal. Understanding subalternation is crucial for analyzing logical relationships and deriving conclusions from categorical propositions.
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