4 ideas
9807 | In pursuing truth, anything less certain than mathematics is a waste of time [Descartes] |
19387 | Hypotheses come from induction, which is comparison of experiences [Leibniz] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |