Is the negation of a singular proposition its contrary or its contradictory?

Question

Quizplus · Accepted Answer

The negation of a singular proposition is its contradictory, as it denies the existence of the subject. The contrary proposition, on the other hand, affirms the opposite of the subject, without denying its existence. For example, the negation of the singular proposition "John is alive" would be "John is not alive," which is the contradictory, while the contrary would be "John is dead." Therefore, the best choice is C, which indicates that the negation of a singular proposition is its contradictory only.

Is the Negation of a Singular Proposition Its Contrary or Its