As a rule of thumb, it is safe to adopt the traditional square of opposition when all propositions being considered are:

Name: As a rule of thumb, it is safe to adopt the traditional square of opposition when all propositions being considered are:
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Question

Quizplus · Accepted Answer

The traditional square of opposition works under the assumption that the subjects being discussed exist. This is crucial for the relations of contradiction, contrariety, subcontrariety, and subalternation to hold as they traditionally do.

As a Rule of Thumb, It Is Safe to Adopt