7 ideas
| 291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
| 10053 | Geometrical axioms imply the propositions, but the former may not be true [Russell] |
| 10052 | Geometry is united by the intuitive axioms of projective geometry [Russell, by Musgrave] |
| 16634 | I can't be unaware of anything which is in me [Descartes] |
| 293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |
| 3635 | Essence must be known before we discuss existence [Descartes] |
| 3634 | We can't prove a first cause from our inability to grasp infinity [Descartes] |