  The seventh group falls within the philosophy of mind; they have to do with the status of categories in the mind. Since we think about categories and through categories, it is pertinent for a philosopher to ask questions of this sort. This topic is particularly pertinent for those who think that categories are mental entities. In the Middle Ages, the questions raised about the status of categories in the mind are put generally in the context of other topics, such as the status of universals, but much of what medieval authors say about universals can be applied, mutatis mutandis, to categories.