Statements and Definitions
A sentence that can be either true or false.
What is a statement?
2 types of sentences that are not statements.
What are (any two of the following list):
1. Questions (interrogative)
2. Commands (imperative)
3. Nonsense
4. Exclamatory
The four Standard Catagorical Statements from the Square of Opposition
What are:
A - All S is P. E - No S is P. I - Some S is P.
O - Some S is not P.
All kids are crazy.
Some kids are crazy.
What is sub implication?
Two statements that can be true at the same time.
A statement whose truth value can be determined by the statement itself.
What is a self-supporting statement?
The truth or falsity of a supported statement can be determined these three way...
What are:
1. Authority
2. Experience
3. Deduction
The "Quantity" on the Top of the Square of Opposition
What is Universal
All parents are old people.
Some parents are not old people.
What is Contradiction?
a disagreement with an actual inconsistency
What is a real disagreement
A statement based on someones own desires, beliefs, or feelings. Always considered true.
What is a self-report?
The truth or falsity of one statement has no bearing on the truth value of the other.
What are Independent Statements?
The relationship between statements A and O and Statements E and I
What is Contradiction?
Some kids like candy.
All kids like candy.
What is Superimplication?
a disagreement based on a difference of opinion or perception
What is an apparent disagreement?
a statement that is always true by logical structure
What is a Tautology ?
Two Statements that cannot be true at the same time.
What are Inconsistent Statements?
The relationship that exists between statements A and E
What is Contrariety?
No grass is blue.
Some grass is blue.
What is contradiction?
An argument that is simply a misunderstanding due to differing definitions of one or more words
What is a Verbal disagreement?
A statement that is false by its logical structure.
The one basic verb that is required for all categorical statements (copula)
What is the TO BE verb (am, are, is, was, were, being, been)?
The "Quality" on the Right side of the Square of Opposition (E and O)
What is Negative?
All Logic students are people who breathe air.
Some Logic students are people who breathe air.
What is Subimplication?
No Christians are Buddhists. No Buddhists are Christians.
What is Logical Equivalence?