13 ideas
10688 | 'Equivocation' is when terms do not mean the same thing in premises and conclusion [Beall/Restall] |
10690 | Formal logic is invariant under permutations, or devoid of content, or gives the norms for thought [Beall/Restall] |
10691 | Logical consequence needs either proofs, or absence of counterexamples [Beall/Restall] |
10695 | Logical consequence is either necessary truth preservation, or preservation based on interpretation [Beall/Restall] |
10689 | A step is a 'material consequence' if we need contents as well as form [Beall/Restall] |
10696 | A 'logical truth' (or 'tautology', or 'theorem') follows from empty premises [Beall/Restall] |
10693 | Models are mathematical structures which interpret the non-logical primitives [Beall/Restall] |
10692 | Hilbert proofs have simple rules and complex axioms, and natural deduction is the opposite [Beall/Restall] |
1490 | You would have to be very morally lazy to ignore criticisms of your own culture [Nagel] |
23903 | When we admire a work, we see ourselves as its creator [Weil] |
23901 | Relationships depend on equality, so unequal treatment kills them [Weil] |
23904 | The cruelty of the Old Testament put me off Christianity [Weil] |
23902 | I attach little importance to immortality, which is an undecidable fact, and irrelevant to us [Weil] |