Quantity (Categorical Proposition)

In Categorical Logic, each of the standard form propositions can be identified by its quality and its quantity. The quantity of a categorical proposition is either universal or particular.

For example, there are two affirmative and two negative propositions and each one will either be universal or particular:

The quantity of each proposition is determined by whether it is referring to all of a class of things, or some (i.e., at least one member) of a class.