3 ideas
9117 | The smallest heap has four objects: three on the bottom, one on the top [Hart,WD, by Sorensen] |
10632 | The real numbers may be introduced by abstraction as ratios of quantities [Hale, by Hale/Wright] |
7667 | There are two sides to men - the pleasantly social, and the violent and creative [Diderot, by Berlin] |