- QUALITY : This means that the proposition is either affirmative or negative e.g.
- S is P ( students are crooks) is an affirmative proposition.
- S is not P ( parents are not teachers) or No S is P ( No pastors are cheats) are negative propositions
- QUANTITY: this means that the proposition is either universal or particular.
A universal proposition refers to the whole of a class e.g.
- All teachers are intelligent persons
- No students are businessmen
A particular proposition refers to some members of a group or class. e.g
- Some dogs are wild animals
- Some girls are not faithful persons
By combining the qualitative and the quatitative values, these propositions can be classified into 4 types as illustrated below;
- Universal affirmative
- Universal negative
- Particular affirmative
- Particular negative
