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- Paradoxon (de)
- logical contradictions centred on the difference between natural language and logic theory (en)
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- If we extend this convention to human activities, then the statement "If Hitler had won World War II then Europe would now be a single nation" is trivially true, because Hitler did not win World War II. But "If Hitler had won World War II then pigs would now have wings" is also trivially true, for the same reason. In modal logic, however, it would be sensible to debate the truth or falsity of the first of these statements, depending on how history might have changed if the Nazis had won the war. The second would be false, because pigs don't have wings. (en)
- Russell's definition of "p implies q" as synonymous with "either not p or q" solicited the justified objection that according to it a true proposition is implied by any proposition and a false proposition implies any proposition . (en)
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- Professor Stewart's Cabinet of Mathematical Curiosities (en)
- Elements of Analytic Philosophy (en)
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- Strict implication calculus (en)
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- Paradoxes of material implication (en)
- Paradojas de la implicación material (es)
- Paradoxien der materialen Implikation (de)
- Paradoxos da implicação material (pt)
- Парадокс імплікації (uk)
- Парадокс импликации (ru)
- Implikationsparadoxer (sv)
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