Definition:Contrary Statements

Definition
Two statements are said to be contrary if they can both be false, but they cannot both be true.

Example
Let the Universe of Discourse be fruit.

The statements:


 * Every is delicious.
 * Every is not delicious.

are contrary.

Also see

 * Definition:Logical NAND


 * Definition:Categorical Statement
 * Definition:Contradictory Statements
 * Definition:Subcontrary Statements
 * Definition:Square of Opposition


 * Principle of Non-Contradiction