3 ideas
| 6215 | 'Contingent' means that the cause is unperceived, not that there is no cause [Hobbes] |
| 17722 | The concept 'red' is tied to what actually individuates red things [Peacocke] |
| 2116 | The concept of an existing thing must contain more than the concept of a non-existing thing [Leibniz] |