12 ideas
| 3035 | Dialectic involves conversations with short questions and brief answers [Diog. Laertius] |
| 16901 | The equivalent algebra model of geometry loses some essential spatial meaning [Burge] |
| 16902 | Peano arithmetic requires grasping 0 as a primitive number [Burge] |
| 2614 | Modern phenomenalism holds that objects are logical constructions out of sense-data [Ayer] |
| 16892 | Is apriority predicated mainly of truths and proofs, or of human cognition? [Burge] |
| 2615 | The concept of sense-data allows us to discuss appearances without worrying about reality [Ayer] |
| 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] |