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4 ideas
8195 | Undecidable statements result from quantifying over infinites, subjunctive conditionals, and the past tense [Dummett] |
1312 | If everything is and isn't then everything is true, and a midway between true and false makes everything false [Aristotle on Heraclitus] |
21539 | Excluded middle can be stated psychologically, as denial of p implies assertion of not-p [Russell] |
8194 | Surely there is no exact single grain that brings a heap into existence [Dummett] |