Recognizing that the Latin word ''forma'' means not just ''form'' but also ''beauty'' supplies a clue that not all formal models are equally valuable for a purpose of interest. There is a certain quality of formal elegance, or select character, that is essential to the practical utility of the model. | Recognizing that the Latin word ''forma'' means not just ''form'' but also ''beauty'' supplies a clue that not all formal models are equally valuable for a purpose of interest. There is a certain quality of formal elegance, or select character, that is essential to the practical utility of the model. |