Chapter 5
The number of basic categorical propositions in formal logic
What is four basic propositions?
Statements that are in _________ affirm and deny the same predicate of the same subject.
What is opposition?
What is subcontraries?
The status of a term in regard to its extension
What is distribution?
The words we use to say that two statements are logically the same
What is logically equivalent?
The quantifier in the following proposition: All cars are fast.
What is All?
The two ways in which contradictory statements differ from each other
What are quality and quantity?
Two statements are subalternate if they have the same ________ but differ in ________.
What is quality and quantity?
The subject term is distributed in statements whose quantity is _________.
What is universal?
What is the predicate?
The quality of a proposition has to do with whether it is ___________ or ____________.
What is affirmative or negative?
Two statements are _________ to one another if they are both universals but differ in quality.
What is contrary?
The subcontrary statement to "Some S is P"
What is "Some S is not P"?
The type of proposition in which the predicate term is always undistributed
What is affirmative?
The rule that says a term which is not negated is equivalent to a term that is negated twice (and vice versa)
What is double negation?
The ___________ of a proposition has to do with whether it is universal or particular.
What is quantity?
True or False:
Contraries cannot at the same time both be true.
What is true?
The true/false position of the universal subaltern when the particular subaltern is false
What is false?
The predicate term in O statements is ________.
What is distributed?
Three ways to convert propositions into their logical equivalents
What are obversion, conversion, and contraposition?
The letter representing the particular, affirmative proposition
What is I?
What is A and O?
What is E and I?
The four ways that any two statements--A, I, E, and O-- can be related in opposition
What are contradictory, contrary, subcontrary, or subalternate?
What is the E statement?
The only method of converting propositions into their logical equivalents that is permissible with all four kinds of statements
What is obversion?