7 ideas
19404 | Necessities rest on contradiction, and contingencies on sufficient reason [Leibniz] |
8083 | Boole applied normal algebra to logic, aiming at an algebra of thought [Boole, by Devlin] |
7727 | Boole's notation can represent syllogisms and propositional arguments, but not both at once [Boole, by Weiner] |
8686 | Boole made logic more mathematical, with algebra, quantifiers and probability [Boole, by Friend] |
22277 | Boole's method was axiomatic, achieving economy, plus multiple interpretations [Boole, by Potter] |
8886 | Being a true justified belief is not a sufficient condition for knowledge [Gettier] |
19403 | Each of the infinite possible worlds has its own laws, and the individuals contain those laws [Leibniz] |