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

Really a definition, as such, cannot explain a thing's nature, being merely an identical proposition explaining the meaning of a word.

From Analysis of Mr. Mill's System of Logic by Stebbing, W. (William)

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

A practical law which I recognise as such must be qualified for universal legislation; this is an identical proposition and, therefore, self-evident.

From The Critique of Practical Reason by Abbott, Thomas Kingsmill

That nothing can extend beyond its limits is an identical proposition.

From The Destiny of the Soul A Critical History of the Doctrine of a Future Life by Alger, William Rounseville

It admits of but one attribution, and that embracing an identical proposition.

From Life: Its True Genesis by Wright, R. W.