13 ideas
| 19441 | All philosophies presuppose their historical moment, and arise from it [Feuerbach] |
| 19442 | I don't study Plato for his own sake; the primary aim is always understanding [Feuerbach] |
| 19445 | A dialectician has to be his own opponent [Feuerbach] |
| 19444 | Each proposition has an antithesis, and truth exists as its refutation [Feuerbach] |
| 19443 | Truth forges an impersonal unity between people [Feuerbach] |
| 8083 | Boole applied normal algebra to logic, aiming at an algebra of thought [Boole, by Devlin] |
| 7727 | Boole's notation can represent syllogisms and propositional arguments, but not both at once [Boole, by Weiner] |
| 8686 | Boole made logic more mathematical, with algebra, quantifiers and probability [Boole, by Friend] |
| 22277 | Boole's method was axiomatic, achieving economy, plus multiple interpretations [Boole, by Potter] |
| 19446 | To our consciousness it is language which looks unreal [Feuerbach] |
| 19447 | The Absolute is the 'and' which unites 'spirit and nature' [Feuerbach] |
| 1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
| 5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |