500
List the 7 rules of categorical syllogisms.
What is 1. There must be 3 and only 3 terms.
2. The middle term must not occur in the conclusion.
3. If a term is distributed in the conclusion then it must be distributed in the premises.
4. The middle term must be distributed at least once.
5. No conclusion can follow from 2 negative premises.
6. If the 2 premises are affirmative, the conclusion must be affirmative.
7. If either premise is negative, the conclusion must be negative.