8 ideas
| 21597 | Logical connectives have the highest precision, yet are infected by the vagueness of true and false [Russell, by Williamson] |
| 9051 | Since natural language is not precise it cannot be in the province of logic [Russell, by Keefe/Smith] |
| 9054 | Vagueness is only a characteristic of representations, such as language [Russell] |
| 15119 | Aristotelian explanation by essence may need to draw on knowledge of other essences [Aristotle, by Koslicki] |
| 1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
| 23302 | Plants have far less life than animals, but more life than other corporeal entities [Aristotle] |
| 5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |
| 23301 | There is a gradual proceeding from the inanimate to animals, with no clear borderlines [Aristotle] |