7 ideas
| 10496 | Monothetic categories have fixed defining features, and polythetic categories do not [Ellen] |
| 10497 | In symbolic classification, the categories are linked to rules [Ellen] |
| 10494 | Several words may label a category; one word can name several categories; some categories lack words [Ellen] |
| 10495 | Continuous experience sometimes needs imposition of boundaries to create categories [Ellen] |
| 10498 | Classification is no longer held to be rooted in social institutions [Ellen] |
| 5467 | Euler said nature is instrinsically passive, and minds cause change [Euler, by Ellis] |
| 14014 | Space alone, and time alone, will fade away, and only their union has an independent reality [Minkowski] |