15 ideas
| 14970 | Normal system K has five axioms and rules [Cresswell] |
| 14971 | D is valid on every serial frame, but not where there are dead ends [Cresswell] |
| 14972 | S4 has 14 modalities, and always reduces to a maximum of three modal operators [Cresswell] |
| 14973 | In S5 all the long complex modalities reduce to just three, and their negations [Cresswell] |
| 14976 | Reject the Barcan if quantifiers are confined to worlds, and different things exist in other worlds [Cresswell] |
| 14974 | A relation is 'Euclidean' if aRb and aRc imply bRc [Cresswell] |
| 14975 | A de dicto necessity is true in all worlds, but not necessarily of the same thing in each world [Cresswell] |
| 5049 | Intelligent pleasure is the perception of beauty, order and perfection [Leibniz] |
| 7257 | All modern social systems seem to be conspiracies of the rich [More,T] |
| 7254 | If you try to get elected, you should be permanently barred from seeking office [More,T] |
| 7255 | Only Utopians fail to see glory in warfare [More,T] |
| 7253 | In Utopia, legal euthanasia is considered honourable [More,T] |
| 5048 | Perfection is simply quantity of reality [Leibniz] |
| 7256 | In Utopia, the Supreme Being is identical with Nature [More,T] |
| 5050 | Evil serves a greater good, and pain is necessary for higher pleasure [Leibniz] |