display all the ideas for this combination of texts
3 ideas
2430 | I can learn the concepts of duration and number just from observing my own thoughts [Descartes] |
2252 | Surely maths is true even if I am dreaming? [Descartes] |
13741 | If 'there are red roses' implies 'there are roses', then 'there are prime numbers' implies 'there are numbers' [Schaffer,J] |