Unit 2

Question 1

Statements can be true: example

Answer 1

The earth is round

Question 2

Statements can be false:example

Answer 2

I am 7 feet tall

Question 3

Statements can be nonsense: example

Answer 3

The gyre orld the mupper until it wret

Question 4

Self-supporting 1

Answer 4

Self Report: I believe that the sky is blue

Question 5

Self-Supporting 2

Answer 5

True or false by logical structure (tautology): The sky is blue or is not blue

Question 6

Self-Supporting 3

Answer 6

True or false by definition: “all triangles are 3 sided figure” - true “that triangle is an octagon” - false

Question 7

Supported Statement 1

Answer 7

Authority

Question 8

Supported Statement 2

Answer 8

Experience/Observation

Question 9

Supported Statement 3

Answer 9

Deduction

Question 10

Consistency

Answer 10

Two statements can be true at the same time.

Oranges are orange. Grass is green

Question 11

Implication

Answer 11

If statement P implies statement Q, and if statement P is true, then the statement Q must be true

Question 12

Logical Equivalence

Answer 12

The first must imply the second and the second must imply the first.
No Buddhists are Christians.
No Christians are Buddhists

Question 13

Independence

Answer 13

If statements have nothing to do with the true or falseness of another statement then they are independent.
All people have 2 legs
All tricycles have 3 wheels.

Question 14

Real disagreement

Answer 14

Both statements can’t be true at the same time

Question 15

Apparent Disagreement

Answer 15

Differences in opinion or perception.
P1: I think logic is easy
P2: I think logic is hard

Question 16

Verbal Disagreement

Answer 16

When different definitions are used for the same word