5 ideas
| 291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
| 18844 | You would cripple mathematics if you denied Excluded Middle [Hilbert] |
| 23304 | The ancient Memorists said virtually all types of thinking could be done simply by memory [Sorabji] |
| 23303 | Stoics say true memory needs reflection and assent, but animals only have perceptual recognition [Sorabji] |
| 293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |