15 ideas
6259 | Why can't a wise man doubt everything? [Montaigne] |
6263 | No wisdom could make us comfortably walk a wide beam if it was high in the air [Montaigne] |
6258 | Virtue is the distinctive mark of truth, and its greatest product [Montaigne] |
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] |
6262 | We lack some sense or other, and hence objects may have hidden features [Montaigne] |
17619 | We renounce all abstract entities [Goodman/Quine] |
6260 | Sceptics say there is truth, but no means of making or testing lasting judgements [Montaigne] |
6261 | The soul is in the brain, as shown by head injuries [Montaigne] |