4 ideas
10053 | Geometrical axioms imply the propositions, but the former may not be true [Russell] |
10052 | Geometry is united by the intuitive axioms of projective geometry [Russell, by Musgrave] |
1743 | The greatest deterrence for injustice is if uninjured parties feel as much indignation as those who are injured [Solon, by Diog. Laertius] |
2116 | The concept of an existing thing must contain more than the concept of a non-existing thing [Leibniz] |