Syllogisms that break rules IV-VII (may be valid) | |
---|---|
There must be 4 and only 4 terms in a syllogism
What does Rule I say?
|
No conclusion can follow from 2 negative premises
What does rule V say?
|
The fallacy of equivocation and the fallacy of four terms
What are the two fallacies of rule I?
|
If two premises are affirmative, the conclusion must also be affirmative.
What does rule VI say?
|
The middle term must not appear in the conclusion
What does Rule II say?
|
If either premise is negative, the conclusion must be negative
What does Rule VII say?
|
If a term is distributed in the conclusion then it must be distributed in the premises
What does Rule III say?
|
The middle term must be distributed at least once
What does Rule IV say?
|
The fallacy of illicit major and the fallacy of illicit minor
What are the two fallacies associated with Rule III?
|
Rules V-VII
Which rule numbers are the qualitative rules?
|