13 ideas
| 9193 | ZF set theory has variables which range over sets, 'equals' and 'member', and extensionality [Dummett] |
| 9194 | The main alternative to ZF is one which includes looser classes as well as sets [Dummett] |
| 9195 | Intuitionists reject excluded middle, not for a third value, but for possibility of proof [Dummett] |
| 9186 | First-order logic concerns objects; second-order adds properties, kinds, relations and functions [Dummett] |
| 9187 | Logical truths and inference are characterized either syntactically or semantically [Dummett] |
| 9191 | Ordinals seem more basic than cardinals, since we count objects in sequence [Dummett] |
| 9192 | The number 4 has different positions in the naturals and the wholes, with the same structure [Dummett] |
| 22808 | Liberalism is minimal government, or individual rights, or equality [Avineri/De-Shalit] |
| 22803 | Can individualist theories justify an obligation to fight in a war? [Avineri/De-Shalit] |
| 22804 | Autonomy is better achieved within a community [Avineri/De-Shalit] |
| 22806 | Communitarians avoid oppression for the common good, by means of small mediating communities [Avineri/De-Shalit] |
| 22807 | If our values are given to us by society then we have no grounds to criticise them [Avineri/De-Shalit] |
| 2116 | The concept of an existing thing must contain more than the concept of a non-existing thing [Leibniz] |