19 ideas
18739 | Three stages of philosophical logic: syntactic (1905-55), possible worlds (1963-85), widening (1990-) [Horsten/Pettigrew] |
18741 | Logical formalization makes concepts precise, and also shows their interrelation [Horsten/Pettigrew] |
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] |
21103 | Moral questions can only be decided by common opinion [Hume] |
20420 | The emotion expressed is non-conscious, but feels oppressive until expression relieves it [Collingwood] |
20421 | Art exists ideally, purely as experiences in the mind of the perceiver [Collingwood, by Kemp] |
20406 | Art clarifies the artist's mind and feelings, thus leading to self-knowledge [Collingwood, by Davies,S] |
21099 | People must have agreed to authority, because they are naturally equal, prior to education [Hume] |
21100 | The idea that society rests on consent or promises undermines obedience [Hume] |
20495 | We no more give 'tacit assent' to the state than a passenger carried on board a ship while asleep [Hume] |
21101 | The people would be amazed to learn that government arises from their consent [Hume] |
6703 | Poor people lack the knowledge or wealth to move to a different state [Hume] |
21102 | We all know that the history of property is founded on injustices [Hume] |