6 ideas
| 8728 | Intuitionist mathematics deduces by introspective construction, and rejects unknown truths [Brouwer] |
| 9086 | The idea of abstract objects is not ontological; it comes from the epistemological idea of abstraction [Plantinga] |
| 9087 | Theists may see abstract objects as really divine thoughts [Plantinga] |
| 9085 | If propositions are concrete they don't have to exist, and so they can't be necessary truths [Plantinga] |
| 19216 | Propositions (such as 'that dog is barking') only exist if their items exist [Williamson] |
| 9084 | Propositions can't just be in brains, because 'there are no human beings' might be true [Plantinga] |