9 ideas
13831 | Logic is based on transitions between sentences [Prawitz] |
13825 | Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz] |
13823 | In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz] |
23633 | Many truths seem obvious, and point to universal agreement - which is what we find [Reid] |
23630 | Only philosophers treat ideas as objects [Reid] |
23629 | The ambiguity of words impedes the advancement of knowledge [Reid] |
1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
23632 | Similar effects come from similar causes, and causes are only what are sufficient for the effects [Reid] |
5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |