The MOOD of a syllogism is a 3 letter listing of the type of categorical
propositions which make up the 2 premises and the conclusion in that order.
| A | All S are P |
| I | Some S are P |
| E | No S are P |
| O | Some S are not P |
The figure of a syllogism is a numeral referring to the order of the middle terms in the premises. One way to remember the order is to think of a W.
| M p | p M | M p | p M |
| s M | s M | M s | M s |
| 1 | 2 | 3 | 4 |
| For example: | No P are M | ||
| Some M are S | |||
| So, | Some S are not P | has mood EIO and figure 4 |