14 ideas
9193 | ZF set theory has variables which range over sets, 'equals' and 'member', and extensionality [Dummett] |
9194 | The main alternative to ZF is one which includes looser classes as well as sets [Dummett] |
9195 | Intuitionists reject excluded middle, not for a third value, but for possibility of proof [Dummett] |
9186 | First-order logic concerns objects; second-order adds properties, kinds, relations and functions [Dummett] |
9187 | Logical truths and inference are characterized either syntactically or semantically [Dummett] |
9191 | Ordinals seem more basic than cardinals, since we count objects in sequence [Dummett] |
9192 | The number 4 has different positions in the naturals and the wholes, with the same structure [Dummett] |
579 | Cratylus said you couldn't even step into the same river once [Cratylus, by Aristotle] |
8851 | Coherentists say that regress problems are assuming 'linear' justification [Williams,M] |
8849 | Traditional foundationalism is radically internalist [Williams,M] |
8853 | Basic judgements are immune from error because they have no content [Williams,M] |
8855 | Sensory experience may be fixed, but it can still be misdescribed [Williams,M] |
8852 | In the context of scepticism, externalism does not seem to be an option [Williams,M] |
578 | Cratylus decided speech was hopeless, and his only expression was the movement of a finger [Cratylus, by Aristotle] |