2. What moods are common to all the figures?
3. Why can there be no subaltern moods in the third figure?
4. What is the only kind of conclusion that can be drawn in all the figures?
5. Show that IEO violates the special rules of all the figures.
6. In what figures is AEE valid?
7. Show that AEO is superfluous in any figure.
8. Prove that O cannot be a premiss in the first figure, nor a minor premiss anywhere but in the second.
9. Show that in the first figure the conclusion must have the quality of the major premiss and the quantity of the minor.
10. Why do the premisses EA yield a universal conclusion in the first two figures and only a particular one in the last two?
11. Show that AAI is the only mood in the fourth figure in which it is possible for the major term to be distributed in the premiss and undistributed in the conclusion.