3 ideas
| 13127 | Categories can't overlap; they are either disjoint, or inclusive [Sommers, by Westerhoff] |
| 18431 | Internal relations combine some tropes into a nucleus, which bears the non-essential tropes [Simons, by Edwards] |
| 22881 | Should we value environmental systems for human benefit, or for their own sake? [Hildebrand] |