12 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] |
5952 | Rather than being the whole soul, maybe I am its chief part? [Plutarch] |
5951 | If atoms have no qualities, they cannot possibly produce a mind [Plutarch] |
20796 | Action needs an affinity for a presentation, and an impulse toward the affinity [Plutarch] |
541 | Virtue comes more from habit than character [Critias] |
5948 | The good life involves social participation, loyalty, temperance and honesty [Plutarch] |
5950 | If only atoms exist, how do qualities arise when the atoms come together? [Plutarch] |
542 | Fear of the gods was invented to discourage secret sin [Critias] |
5955 | No one will ever find a city that lacks religious practices [Plutarch] |