4 ideas
21548 | The null class is the class with all the non-existents as its members [MacColl, by Lackey] |
19406 | I strongly believe in the actual infinite, which indicates the perfections of its author [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] |