Lesson 16: Subcontrariety

Question 1

Subcontrariety

Answer 1

The relationship between I and O statements

Question 2

What is the difference between contrariety and subcontrariety?

Answer 2

They are basically exact opposites:
Contrariety: Both statements can’t be true, but can both be false at the same time
Subcontrariety: Both statements can be true, but cannot be false at the same time.