| Link | Quote | Stars | Tags | Author |
| 3ddc918 | If a tree falls in a forest, and no-one is around to hear it, does it make a noise? | Observation | ||
| 7bf7f09 | Most, if not all, of the great ideas of modern mathematics have had their origin in observation. | Observation | ||
| 8fb80e4 | The gap between our feelings and our social observation is dangerously wide. | Observation |