4 ideas
15927 | Definition just needs negation, known variables, conjunction, disjunction, substitution and quantification [Weyl, by Lavine] |
16707 | Cold and hot are the swiftness and slowness of corpuscular motion [Beeckman] |
10246 | The limit of science is isomorphism of theories, with essences a matter of indifference [Weyl] |
1513 | The Egyptians were the first to say the soul is immortal and reincarnated [Herodotus] |