7 ideas
10163 | Propositional modal logic has been proved to be complete [Kripke, by Feferman/Feferman] |
10760 | With possible worlds, S4 and S5 are sound and complete, but S1-S3 are not even sound [Kripke, by Rossberg] |
16189 | The variable domain approach to quantified modal logic invalidates the Barcan Formula [Kripke, by Simchen] |
15132 | The Barcan formulas fail in models with varying domains [Kripke, by Williamson] |
10800 | The values of variables can't determine existence, because they are just expressions [Ryle, by Quine] |
10356 | Relativism can be seen as about the rationality of different cultural traditions [MacIntyre, by Kusch] |
23080 | Liberals debate how conservative or radical to be, but don't question their basics [MacIntyre] |