Mental Act
The form a proposition must have in order to be handled logically
What is Logical Form?
This has to do with whether a proposition is universal or particular
What is Quantity?
The rule governing that two statements are both particular statements that differ in quality
What is the Rule of Subcontraries?
The status of a term in regards to its extension
What is Distribution?
Three ways to convert propositions into their logical equivalents
What is Obversion, Conversion, and Contraposition?
The second mental act of logic by which the intellect unites by affirming, or separates by denying
What is Judgment?
Some S is P
What is I?
Two subcontraries may at the same time be true, but cannot at the same time be false
What is the Third Law of Opposition?
This is distributed in statements whose quantity is universal and undistributed in statements whose quantity is particular
What is the Subject-Term?
To interchange the subject and predicate
What is Conversion?
The two concepts that a judgment unites or separates
What is the Subject and the Predicate?
This has to do with whether a statement is affirmative or negative
What is Quality?
The rule that governs two statements that have the same quality, but differ in quantity
What is the Rule of Subalterns?
In this proposition, the predicate-term is always undistributed
What is Affirmative?
When you change the quality of the statement and negate the predicate
What is Obversion?
The three elements of any proposition
What is the Subject-Term, the Predicate-Term, and the Copula?
Statement type that is Negative - Particular
What is O?
Two contraries cannot both be true at the same time, but can, at the same time, both be false
What is the Second Law of Opposition?
This statement type has both subject and predicate terms as distributed
What is E?
A term which is not negated is equivalent to a term that is negated twice
What is Double Negation?
A sentence or statement which expresses truth or falsity
What is a Proposition?
The words "All", "Some", "No", and "Some....not"
What is the Quantifier?
The rule that governs two statements that are both universal but differ in quality
What is the Rule of Contraries?
This statement type has subject-term as distributed and predicate-term as undistributed
What is A?
The 3 step process: obvert, convert, and obvert again
What is Contraposition?