display all the ideas for this combination of texts
4 ideas
2252 | Surely maths is true even if I am dreaming? [Descartes] |
2430 | I can learn the concepts of duration and number just from observing my own thoughts [Descartes] |
9867 | It is absurd to define a circle, but not be able to recognise a real one [Plato] |
9865 | Daily arithmetic counts unequal things, but pure arithmetic equalises them [Plato] |