Unit 2.5

Question 1

Categorical statements

Answer 1

1. All S is P: Universal
2. No S is P: Universal
3. Some S are P: Particular
4. Some S are not P: Particular

Question 2

Square of Opposition

Answer 2

A, E, I, O

Question 3

A Statements

Answer 3

Universal Affirmative

All C are G

Question 4

E Statements

Answer 4

Universal Negative

No C are G

Question 5

I Statements

Answer 5

Particular Affirmative

Some C are B

Question 6

O Statements

Answer 6

Particular Negative

Some C are not B

Question 7

Contradiction

Answer 7

X in the middle of the square.

If A is true than O is false. If E is true than I is false and vice versa.

Question 8

Contrariety

Answer 8

Line at the top between A and E.

They can’t be true, but both can be false

Question 9

Sub Contrariety

Answer 9

Line at the bottom between I and O

They both can’t be false but they can both be true.

Question 10

Subimplication

Answer 10

Line down from A or E to I or O respectively.

If A is true than I must be true. Same for E and O.

Question 11

Super Implication

Answer 11

Line up from I or O to A or E respectively.

If I is false than A must be false too. Same for O and E.

Question 12

What is a categorical statement?

Answer 12

It is a statement that affirm or deny something about a given subject