Lessons 6-10

Question 1

Statement

Answer 1

a sentence that has truth value, it is true or false

Question 2

non-statement

Answer 2

question, command, nonsense

Question 3

self supporting statement

Answer 3

statement about one’s own thoughts or beliefs

a statement whose truth value can be determined from the statement itself

Question 4

3 categories of self-supporting

Answer 4

1. T/F by logical structure
2. T/F by definition
3. Self supporting statement

Question 5

T/F by logical structure

Answer 5

tautology

self-contradiction

Question 6

tautology

Answer 6

P or not P
true by logical because it covers all the bases
My eyes are blue or my eyes are not blue

Question 7

self-contradiction

Answer 7

P and not P
statement is always false because of its logical structure
My eyes are blue and my eyes are not blue

Question 8

T/F by definition

Answer 8

All triangles have 3 sides

This triangle is an octagon

Question 9

supported statement

Answer 9

need outside information
a statement whose truth value depends on evidence or information from outside itself
1. Authority
2. Experience
3. Deduction

Question 10

3 sources of information for supported statements

Answer 10

1. Authority
2. Experience
3. Deduction

Question 11

4 relationships between statements

Answer 11

1. consistency
2. implication
3. logical equivalence
4. independence

Question 12

consistent statements

Answer 12

two statements are consistent if they can both be true at the same time…no conflict

Question 13

statements related by implication

Answer 13

two statements are related by implication if the truth of one requires the truth of the other.
Some S is P does not imply some P is S…only goes in one direction

Question 14

logically equivalent statements

Answer 14

The statements imply each other.

both statements must be true or both must be false

Question 15

independent statements

Answer 15

The truth values have no effect on each other

Question 16

3 kinds of disagreements

Answer 16

1. Real disagreement
2. Apparent disagreement
3. Verbal disagreement

Question 17

real disagreement

Answer 17

An actual inconsistency between two statements, they both cannot be true at the same time

Question 18

apparent disagreement

Answer 18

is a difference of opinion or perception

Question 19

verbal disagreement

Answer 19

a misunderstanding due to differing definitions for one or more words