7 ideas
| 10494 | Several words may label a category; one word can name several categories; some categories lack words [Ellen] |
| 16659 | Relations do not add anything to reality, though they are real aspects of the world [Olivi] |
| 16673 | Quantity just adds union and location to the extension of parts [Olivi] |
| 17371 | Some kinds are very explanatory, but others less so, and some not at all [Devitt] |
| 16663 | Things are limited by the species to certain modes of being [Olivi] |
| 17372 | The higher categories are not natural kinds, so the Linnaean hierarchy should be given up [Devitt] |
| 17373 | Species pluralism says there are several good accounts of what a species is [Devitt] |