Contradictory, contrary, subcontrary, and subaltern
What are the four kinds of Opposition?
100
Logic
What is the science of right thinking?
100
Univocal, equivocal, analogous
What are three types of Signification?
100
Major, minor, middle
What are three terms in a syllogism?
100
An argument is this when its conclusion follows logically from its premises.
What is valid?
200
Subcontraries may at the same time both be true, but CANNOT at the same time both be false.
What is the Third Law of Opposition?
200
Intelligible content of a concept
What is Comprehension?
200
Material, logical, real
What are three types of Supposition?
200
The three categories of Rules of Validity.
What are terminological, quantitative, and qualitative?
300
Contradictories cannot at the same time be true NOR at the same time be false.
What is tje First Law of Opposition?
300
Everything a concept refers to.
What is Extension?
300
Subject term, predicate term, copula
What are three elements of a Proposition?
300
Premise which contains major term
What is the Major premise?
300
The two Terminological Rules of Validity.
What are
1) There must be 3 and only 3 terms
2) The middle term must not occur in the conclusion
400
Contraries cannot at the same time both be true, but CAN at the same time be false.
What is the Second Law of Opposition?
400
Status of a term in regard to its extension.
What is Distribution?
400
1) obvert the statement
2) convert the statement
3) obvert the statement again
What are three steps to contraposition?
400
Premise which contains minor term
What is the Minor premise?
400
1) If a term is distributed in conclusion, it must be distributed in the premises.
2) Middle term must be distributed at least once.
What are the two Quantitative Rules of Validity?
500
The four statements of logic
What is All S is P, Some S is P, No S is P, Some S is not P?
500
Two kinds of reasoning
What are deductive and inductive?
500
Obversion, conversion, contraposition
What are three ways to convert logical statements into their logical equivalents?
500
The Mental Act of Syllogism
What is Deductive Inference
500
The three rules of Validity
What are
1) No conclusion can follow from 2 negative premises
2) If 2 premises are affirmative, conclusion must also be affirmative.
3) If either premise is negative, conclusion must be negative.