Lesson 14: Contradiction and Lesson 15: Contrariety

Question 1

Contradiction

Answer 1

The relationship that exists between A and O statements, and I and E statements.

Question 2

Contrary Relationship

Answer 2

That which exists between the universal statements A and E.

Question 3

What is the defining factor for a contrary relationship?

Answer 3

It is not possible for both statements to be true. However, both statements can be false at the same time.

Question 4

Abbreviation for contrary statements.

Answer 4

All A are M
and
No A are M

Question 5

What is the difference between contradiction and contrariety?

Answer 5

Contradictory statements can’t both be true at the same time, and can’t both be false at the same time. On the other hand, contrary statements can’t both be true, but can both be false at the same time.

Question 6

Abbreviations for contradictory statements.

Answer 6

All S are G
and
No S are G