Hypothetical Syllogisms (Disjunctive) Flashcards
What is a Disjunctive Statement?
An ‘either… or’ statement.
What is the form of a Disjunctive Syllogism?
In a Disjunctive Syllogism, the Major Premise is a disjunctive proposition and the Minor Premise is a categorical proposition
What are the Two Elements of a Disjunctive Syllogism?
Both elements are called Alternants, they’re called the First and Second Alternants.
Where does each Alternant go?
The First Alternant goes before ‘or’ in ‘either.. or’ and the second one goes after.
What form does a Disjunctive Syllogism take?
The basic form of a Disjunctive Syllogism is ‘Either P or Q.’
What is Tollendo Ponens?
Affirmation by denial.
What is Ponnendo Tollens?
Denial by affirmation.
Which of the four total Moods are invalid?
The two under Ponnendo Tollens.
What is the first invalid Mood called?
Fallacy of Affirming the First Alternant.
What is the second invalid Mood called?
Fallacy of Affirming the Second Alternant.
What is an Exclusive Disjunction?
A disjunctive statement in which only one of the alternants can be true.
What is an Inclusive Disjunction?
A disjunctive statement in which one or both of the alternants can be true.
