4 ideas
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
8693 | An 'abstraction principle' says two things are identical if they are 'equivalent' in some respect [Boolos] |
7829 | God no more has human perfections than we have animal perfections [Spinoza] |
7830 | A talking triangle would say God is triangular [Spinoza] |