Ch 8, exercise 42.a, page 50 in Traditional Logic I Teacher Key incorrect?
Is Ch 8, exercise 42.a, page 50 in Traditional Logic I Teacher Key 3rd Edition (2018) incorrect?
The teacher key says "T" for 42.a, but I think it should be false.
"indicate whether the following statements are true or false
a. The A statement and the E statement are not subcontrary because, although they differ in quality, they do not differ in quantity. "
"do not differ in quantity" is not a sufficient reason to conclude that they are not subcontrary, they need to not be both particular.
cc martin
The teacher key says "T" for 42.a, but I think it should be false.
"indicate whether the following statements are true or false
a. The A statement and the E statement are not subcontrary because, although they differ in quality, they do not differ in quantity. "
"do not differ in quantity" is not a sufficient reason to conclude that they are not subcontrary, they need to not be both particular.
cc martin