9 ideas
| 12129 | 'Truth' may only apply within a theory [Kuhn] |
| 15642 | If kinds depend only on what can be observed, many underlying essences might produce the same kind [Eagle] |
| 15645 | Nominal essence are the observable properties of things [Eagle] |
| 15643 | Nominal essence mistakenly gives equal weight to all underlying properties that produce appearances [Eagle] |
| 6809 | Kuhn came to accept that all scientists agree on a particular set of values [Kuhn, by Bird] |
| 12128 | In theory change, words shift their natural reference, so the theories are incommensurable [Kuhn] |
| 13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
| 15641 | Kinds are fixed by the essential properties of things - the properties that make it that kind of thing [Eagle] |
| 20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |