**6. Quantifying concepts**

A quantifying concept plays a role in a function that has an objective graph and optional parameters as input data and that outputs a numerical value. In general, one can classify quantifying concepts into three types. In the following, we explain each type of quantifying concept. We describe a quantifying concept by ⫷name of a quantifying concept⫸. Note that we often identify a concept with a set and that all sets are considered to be finite.
