contrapositive

Example Sentences

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The proof of part ii. is the contrapositive of part i.

From Textbooks • Mar. 30, 2016

He has a wife and kids at home," says twin Nicole, who then states the contrapositive of the real lesson of reality programming: "Celebs like him are just average normal people.

From Time Magazine Archive

In the case of the I proposition the contrapositive is impossible, as infringing the main rule of conversion.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" by Various

This appearance arises from mentally reading the E as an A proposition: but, if it were so taken, the result would be its contrapositive, and not its converse by negation.

From Deductive Logic by Stock, St. George William Joseph

So a man may say, "All men are mortal," meaning that the angels never taste death, "angels" being the contrapositive of his subject "men".

From Logic, Inductive and Deductive by Minto, William