4 ideas
2614 | Modern phenomenalism holds that objects are logical constructions out of sense-data [Ayer] |
2615 | The concept of sense-data allows us to discuss appearances without worrying about reality [Ayer] |
9141 | Abstraction theories build mathematics out of second-order equivalence principles [Cook/Ebert] |
22881 | Should we value environmental systems for human benefit, or for their own sake? [Hildebrand] |