16 ideas
| 18739 | Three stages of philosophical logic: syntactic (1905-55), possible worlds (1963-85), widening (1990-) [Horsten/Pettigrew] |
| 13827 | Logical consequence isn't a black box (Tarski's approach); we should explain how arguments work [Prawitz] |
| 18741 | Logical formalization makes concepts precise, and also shows their interrelation [Horsten/Pettigrew] |
| 13826 | Model theory looks at valid sentences and consequence, but not how we know these things [Prawitz] |
| 18744 | Models are sets with functions and relations, and truth built up from the components [Horsten/Pettigrew] |
| 18740 | If 'exist' doesn't express a property, we can hardly ask for its essence [Horsten/Pettigrew] |
| 18745 | A Tarskian model can be seen as a possible state of affairs [Horsten/Pettigrew] |
| 18747 | The 'spheres model' was added to possible worlds, to cope with counterfactuals [Horsten/Pettigrew] |
| 18748 | Epistemic logic introduced impossible worlds [Horsten/Pettigrew] |
| 18746 | Possible worlds models contain sets of possible worlds; this is a large metaphysical commitment [Horsten/Pettigrew] |
| 18750 | Using possible worlds for knowledge and morality may be a step too far [Horsten/Pettigrew] |
| 21733 | The right-wing conception of freedom is based on the idea of self-ownership [Cohen,GA] |
| 21739 | Plenty of people have self-ownership, but still lack autonomy [Cohen,GA] |
| 21736 | It is doubtful whether any private property was originally acquired legitimately [Cohen,GA] |
| 21734 | It is plausible that no one has an initial right to own land and natural resources [Cohen,GA] |
| 21735 | Every thing which is now private started out as unowned [Cohen,GA] |