4 ideas
23283 | Necessity implies possibility, but in experience it matters which comes first [Williams,B] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
12702 | Causes can be inferred from perfect knowledge of their effects [Leibniz] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |