| 16661 | There are two sorts of category - referring to things, and to circumstances of things [Boethius] |
| 21448 | Categories are general concepts of objects, which determine the way in which they are experienced [Kant] |
| 5554 | Categories are necessary, so can't be implanted in us to agree with natural laws [Kant] |
| 22078 | Even simple propositions about sensations are filled with categories [Hegel] |
| 15634 | Thought about particulars is done entirely through categories [Hegel] |
| 21920 | No need for a priori categories, since sufficient reason shows the interrelations [Schopenhauer, by Lewis,PB] |
| 16961 | In formal terms, a category is the range of some style of variables [Quine] |
| 13127 | Categories can't overlap; they are either disjoint, or inclusive [Sommers, by Westerhoff] |
| 13403 | The category of Venus is not 'object', or even 'planet', but a particular class of good-sized object [Jubien] |
| 17377 | All descriptive language is classificatory [Dupré] |
| 8283 | Ontological categories are not natural kinds: the latter can only be distinguished using the former [Lowe] |
| 13118 | Categories are base-sets which are used to construct states of affairs [Westerhoff] |
| 13117 | How far down before we are too specialised to have a category? [Westerhoff] |
| 13116 | Maybe objects in the same category have the same criteria of identity [Westerhoff] |
| 13124 | Categories can be ordered by both containment and generality [Westerhoff] |
| 13125 | Categories are held to explain why some substitutions give falsehood, and others meaninglessness [Westerhoff] |
| 13126 | Categories systematize our intuitions about generality, substitutability, and identity [Westerhoff] |
| 13130 | Categories as generalities don't give a criterion for a low-level cut-off point [Westerhoff] |
| 10496 | Monothetic categories have fixed defining features, and polythetic categories do not [Ellen] |
| 10497 | In symbolic classification, the categories are linked to rules [Ellen] |
| 18564 | Do categories store causal knowledge, or typical properties, or knowledge of individuals? [Machery] |