chapter 6 & 7

Question 1

Express the Rule of Subcontraries.

Answer 1

Two statements are subcontrary if they are both particular that differ in quality.

Question 2

Tell the quality and quantity of the I statement.

Answer 2

Affirmative and particular

Question 3

Tell the quality and quantity of the O statement.

Answer 3

Negative and particular

Question 4

Is the I statement subcontrary to the 0 statement? If so, explain why; if not, explain why not.

Answer 4

Yes. I and O are subcontrary to each other b/c both are particular and differ in quality

Question 5

Which other pair of statements are subcontrary to one another?

Answer 5

No other statements are subcontrary to each other

Question 6

What is the Third Law of Opposition?

Answer 6

Subcontraries may at the same time be true, but cannot at the same time be false

Question 7

Can both I and O statements be true at the same time?

Answer 7

Yes

Question 8

Can both I and O statements be false at the same time?

Answer 8

No

Question 9

Which pair of statements complies with the Third Law of Opposition?

Answer 9

I and O statements

Question 10

Express the Rule of Subalterns.

Answer 10

Two statements that have the same quality but differ in quantity

Question 11

Tell the quality and quantity of the A statement.

Answer 11

affirmative and universal

Question 12

Tell the quality and quantity of the I statement,

Answer 12

affirmative and particular

Question 13

Is the A statement subalternate to the I statement? If so, explain why; if not, explain why not.

Answer 13

Yes, because they have the same quality, but differ in quantity

Question 14

Are there any other pairs of statements that are subalternate to one another? If so, indicate which
they are.

Answer 14

Yes: E and O statements

Question 15

What is the Fourth Law of Opposition?

Answer 15

Subalterns=both true or both false. If particular=false, universal=false, if universal=true, particular=true

Question 16

Which pairs of statements comply with the Fourth Law of Opposition?

Answer 16

A and I statements and E and O statements

Question 17

Can both A and I statements be true at the same time?

Answer 17

yes

Question 18

Can both A and I statements be false at the same time?

Answer 18

Yes

Question 19

Can both E and 0 statements be true at the same time?

Answer 19

yes

Question 20

Can both E and 0 statements be false at the same time

Answer 20

yes

Question 21

28. Explain why the A statement “All S is P” and the E statement “No S is P” are not subalternate.

Answer 21

because they are not same in quality and don’t differ in quantity

Question 22

Explain why the I statement “Some S is P” and the 0 statement “Some S is not P” are not subalternate.

Answer 22

because they are nto same in quality and don’t differ in quantity