identical proposition

American  

noun

Logic.

1. a proposition in which the subject and predicate have the same meaning, as, “That which is mortal is not immortal.”

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identical proposition British  

noun

1. logic a necessary truth, esp a categorial identity, such as whatever is triangular has three sides

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Etymology

Origin of identical proposition

First recorded in 1635–45

Example Sentences

Reflection 5.—The foregoing Reflection is not an identical proposition.

From The Fiend's Delight by Bierce, Ambrose

That every thing predicable of the universal was predicable of the various individuals contained under it, was then no identical proposition, but a statement of what was conceived as a fundamental law of the universe.

From A System Of Logic, Ratiocinative And Inductive by Mill, John Stuart

But when Amelia puts her foot down, she puts her foot down—a fact which she is unnecessarily fond of emphasising in that identical proposition.

From An African Millionaire Episodes in the Life of the Illustrious Colonel Clay by Allen, Grant

As regards Obligatory Morality, this seems at first sight an identical proposition; morality is another name for law and sovereignty.

From Moral Science; a Compendium of Ethics by Bain, Alexander

The dictum de omni not the foundation of reasoning, but a mere identical proposition 191 3.

From A System of Logic: Ratiocinative and Inductive 7th Edition, Vol. I by Mill, John Stuart