12 ideas
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] |
13827 | Logical consequence isn't a black box (Tarski's approach); we should explain how arguments work [Prawitz] |
11028 | λ-abstraction disambiguates the scope of modal operators [Fitting] |
13826 | Model theory looks at valid sentences and consequence, but not how we know these things [Prawitz] |
15377 | Definite descriptions pick out different objects in different possible worlds [Fitting] |
22593 | Our sensation of light may not be the same as what produces the sensation [Descartes] |
16569 | The Hot, Cold, Wet and Dry of the philosophers need themselves to be explained [Descartes] |
20964 | Descartes said there was conservation of 'quantity of motion' [Descartes, by Papineau] |