Lesson 24: Testing Syllogisms by Counterexample Flashcards
1
Q
What does validity depend on?
A
Validity depends on the form of the syllogism.
2
Q
What are the two ways of testing the validity of a syllogism?
A
By Counterexample or By Rules
3
Q
How can you test by counterexample?
A
Replace the middle, major, and minor terms with different words. If the conclusion is still false while the premises are still true, the syllogism is invalid.
4
Q
What does a counterexample do?
A
A counterexample substitutes terms with other terms to see if the premises are still true and the conclusion is still false. If they are, the syllogism is invalid.
