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

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

But take the obverse of the contrapositive of both premises: All m is p; All m is s: ∴ Some s is p.

From Logic Deductive and Inductive by Read, Carveth

But inasmuch as any positive may have more than one contrapositive, we cannot tell immediately or without some knowledge of the circumstances or context, what the precise counter-implicate is.

From Logic, Inductive and Deductive by Minto, William