Does an O proposition have a contrary?

Question

Quizplus · Accepted Answer

In traditional square of opposition, the A (universal affirmative) and E (universal negative) propositions are contraries, meaning they cannot both be true but can both be false. The I (particular affirmative) and O (particular negative) propositions are subcontraries, meaning they cannot both be false but can both be true. Therefore, an O proposition does not have a contrary; instead, it has a subcontrary relationship with the I proposition.

Does an O Proposition Have a Contrary