6 ideas
3653 | My Meditations are the complete foundation of my physics [Descartes] |
4736 | Truth is such a transcendentally clear notion that it cannot be further defined [Descartes] |
9565 | Zermelo made 'set' and 'member' undefined axioms [Zermelo, by Chihara] |
3339 | For Zermelo's set theory the empty set is zero and the successor of each number is its unit set [Zermelo, by Blackburn] |
19087 | The meaning or purport of a symbol is all the rational conduct it would lead to [Peirce] |
3652 | I can't prove the soul is indestructible, only that it is separate from the mortal body [Descartes] |