12 ideas
| 8208 | In arithmetic, ratios, negatives, irrationals and imaginaries were created in order to generalise [Quine] |
| 8207 | The quest for simplicity drove scientists to posit new entities, such as molecules in gases [Quine] |
| 15375 | If terms change their designations in different states, they are functions from states to objects [Fitting] |
| 15376 | Intensional logic adds a second type of quantification, over intensional objects, or individual concepts [Fitting] |
| 15378 | Awareness logic adds the restriction of an awareness function to epistemic logic [Fitting] |
| 15379 | Justication logics make explicit the reasons for mathematical truth in proofs [Fitting] |
| 11026 | Classical logic is deliberately extensional, in order to model mathematics [Fitting] |
| 11028 | λ-abstraction disambiguates the scope of modal operators [Fitting] |
| 8205 | Explaining events just by bodies can't explain two events identical in space-time [Quine] |
| 16051 | Life has a new supervenient relation, which alters its underlying physical events [Morgan,L] |
| 8206 | Necessity could be just generalisation over classes, or (maybe) quantifying over possibilia [Quine] |
| 15377 | Definite descriptions pick out different objects in different possible worlds [Fitting] |