10 ideas
| 3035 | Dialectic involves conversations with short questions and brief answers [Diog. Laertius] |
| 1816 | Sceptics say demonstration depends on self-demonstrating things, or indemonstrable things [Diog. Laertius] |
| 1819 | Scepticism has two dogmas: that nothing is definable, and every argument has an opposite argument [Diog. Laertius] |
| 3064 | When sceptics say that nothing is definable, or all arguments have an opposite, they are being dogmatic [Diog. Laertius] |
| 3033 | Induction moves from some truths to similar ones, by contraries or consequents [Diog. Laertius] |
| 1838 | Cyrenaic pleasure is a motion, but Epicurean pleasure is a condition [Diog. Laertius] |
| 1769 | Cynics believe that when a man wishes for nothing he is like the gods [Diog. Laertius] |
| 20948 | Human cultures are organisms which grow, and then fade and die [Spengler, by Bowie] |
| 1868 | The world was made as much for animals as for man [Celsus] |
| 1867 | Christians presented Jesus as a new kind of logos to oppose that of the philosophers [Celsus] |