Argumentation Schemas Flashcards
1
Q
Modus Ponens
A
If A, then B. A.
Therefore, B.
Valid
2
Q
Modus Tollens
A
If A, then B. Not B.
Therefore, not A.
Valid
3
Q
Double negation elimination
A
Not not A.
Therefore A.
Valid
4
Q
Disjunctive Syllogism
A
A or B or C. Not A. Not B.
Therefore C.
Valid
5
Q
Disjunctive Elimination
A
A or B. If A then C. If B then C. Therefore C.
Valid
6
Q
Affirming the Consequent
A
If A, then B. B.
Therefore A.
Invalid
7
Q
Denying the Antecedent
A
If A, then B. Not A.
Therefore not B.
Invalid
8
Q
Validity
A
an inference/ argument is valid whenever all premises are true, and so the conclusion is also true.
9
Q
Invalidity
A
an argument is invalid, if in some situation that the conclusion is false, the premises are true
