4 ideas
13416 | Mathematics must be based on axioms, which are true because they are axioms, not vice versa [Tait, by Parsons,C] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
19376 | A machine is best defined by its final cause, which explains the roles of the parts [Leibniz] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |