display all the ideas for this combination of texts
4 ideas
8643 | Affirmation of existence is just denial of zero [Frege] |
8911 | If abstracta are non-mental, quarks are abstracta, and yet chess and God's thoughts are mental [Rosen on Frege] |
8634 | The equator is imaginary, but not fictitious; thought is needed to recognise it [Frege] |
458 | Nothing could come out of nothing, and existence could never completely cease [Empedocles] |