Ross Woods, 2021
A “category” and a “type” are both ways of defining something and are both notions of the nature of something. However, they are very different:
Paul Hiebert referred to these as “bounded sets” and “centered sets” and applied them to cultures in missiological theory. In that context, centred set thinking refers not to whether someone is close to the ideal, but whether they are moving close to it or further way. If the ideal is X, someone moving closer to it is defined as X even if they are currently far away. Similarly, someone moving away from the ideal is defined as non-X, even if they are currently very close to it.