4 ideas
15927 | Definition just needs negation, known variables, conjunction, disjunction, substitution and quantification [Weyl, by Lavine] |
10246 | The limit of science is isomorphism of theories, with essences a matter of indifference [Weyl] |
18202 | The concept of a field gradually replaced the substances in explaining relations between charges [Einstein/Infeld] |
1513 | The Egyptians were the first to say the soul is immortal and reincarnated [Herodotus] |