A specialization of scalar quantity (q.v.). emotion consists of all the varying degrees of such things as happiness, sadness and other types of emotions. Each instance is a scalar interval that consists of a number and emotional dimension. Rarely, if ever, are these things assigned specific values or ranges of values. But if certain emotional scales came to be used and it proved useful to represent them we could easily assign numeric values to these quantities. Generally, the instances of this collection will be denoted by terms formed by applying the GenericValueFunctions to specializations of this collection: e.g. (highly anger).