Lessons 14-18

Question 1

contradiction

Answer 1

the relationship between statements when they ALWAYS have OPPOSITE truth values
(cannot be both true or both false) A ↔ O contradict; I ↔ E contradict

Question 2

contrariety

Answer 2

the relationship between statements when they CAN both be FALSE, but CANNOT both
be TRUE only A ↔ E are contrary

Question 3

subcontrariety

Answer 3

the relationship between statements when they CAN both be TRUE, but CANNOT both
be FALSE only I ↔ O have subcontrariety

Question 4

subimplication

Answer 4

the relationship between statements OF THE SAME QUALITY in which the TRUTH of
the UNIVERSAL necessitates the TRUTH of the PARTICULAR A → I; E → O

Question 5

superimplication

Answer 5

the relationship between statements OF THE SAME QUALITY in which the FALSITY of
the PARTICULAR necessitates the FALSITY of the UNIVERSAL I → A; O → E