5 ideas
| 15833 | Tell cleverness from answers, but wisdom from questions [Mahfouz] |
| 15927 | Definition just needs negation, known variables, conjunction, disjunction, substitution and quantification [Weyl, by Lavine] |
| 18085 | Values that approach zero, becoming less than any quantity, are 'infinitesimals' [Cauchy] |
| 18084 | When successive variable values approach a fixed value, that is its 'limit' [Cauchy] |
| 10246 | The limit of science is isomorphism of theories, with essences a matter of indifference [Weyl] |