Testing Syllogisms for Validity

There are 256 possible syllogism forms. Below we have listed some of them, specifying syllogisms in terms of mood and figure. For each one, test the syllogism for validity using (1) the Venn Diagram Method, (2) the Truth-Tree Method, and (3) the Rules for Valid Syllogisms method. The links take you to answers using the Rules for Valid Syllogisms.

1. AAA-1

2. IEI-3

3. AOO-2

4. AIA-4

5. OOO-2

6. OAO-1

7. EEE-4

8. EIE-3

9. AAA-4

10. EAE-3