Intro-Lesson 2
The art and science of reasoning well
logic
The sum of all common attributes denoted by the term
intension
A sentence that is either true or false
statement
A statement whose truth value can be determined from the statement itself
self-supporting statement
When two statements can both be true at the same time
consistent
Any statement is either true or false
Law of Excluded Middle
Device, timepiece, clock are stated in what oder?
increasing intension
"Who wrote the book of 1 Timothy" is
a question
self report
A conflict between two statements
inconsistent
If a statement is true, then it is true
Law of Identity
Sum of all the individual objects described by it
extension
Husbands, love your wives as Christ loved the Church.
command
A statement can be true or false by how the sentence is put together
DOUBLE JEOPARDY: if the first statement implies the second statement
logically equivalent
Law of Non-Contradiciton
a word with the same meaning
synonym
This sentence is false.
nonsense
A statement that is true by logical structure
tautology
Truth of the first statement requires the truth of the second statement
implication
This definition deals with the proper models of reasoning
formal logic
These are inversely related
extension and intension
DOUBLE JEOPARDY: The Bible is the Word of God.
true statement
A statement that is false by logical structure
true statement
"I think logic is easy. I think logic is hard." Is this type of disagreement
apparent