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1、Unit1MathematicsPartIESTReadingReading1(http://www.scientificamerican.com/article.cfm?id=what-is-russells-paradoxSectionAPre-readingTaskWarm-upQuestions:Workinpairsanddiscussthefollowingquestions.1.WhoisBertrandRussell?BertrandArthurWilliamRussell(b.1872–d.1970)wasaBritishphilosopher,log
2、ician,essayistandsocialcriticbestknownforhisworkinmathematicallogicandanalyticphilosophy.Hismostinfluentialcontributionsincludehisdefenseoflogicism(theviewthatmathematicsisinsomeimportantsensereducibletologic),hisrefiningofthepredicatecalculusintroducedbyGottlobFrege(whichstillformstheba
3、sisofmostcontemporarylogic),hisdefenseofneutralmonism(theviewthattheworldconsistsofjustonetypeofsubstancethatisneitherexclusivelymentalnorexclusivelyphysical),andhistheoriesofdefinitedescriptionsandlogicalatomism.Russellisgenerallyrecognizedasoneofthefoundersofmodernanalyticphilosophy,an
4、disregularlycreditedwithbeingoneofthemostimportantlogiciansofthetwentiethcentury.2.WhatisRussell’sParadox?Russelldiscoveredtheparadoxthatbearshisnamein1901,whileworkingonhisPrinciplesofMathematics(1903).Theparadoxarisesinconnectionwiththesetofallsetsthatarenotmembersofthemselves.Suchaset
5、,ifitexists,willbeamemberofitselfifandonlyifitisnotamemberofitself.Theparadoxissignificantsince,usingclassicallogic,allsentencesareentailedbyacontradiction.Russell'sdiscoverythuspromptedalargeamountofworkinlogic,settheory,andthephilosophyandfoundationsofmathematics.3.WhateffectdidRussell
6、’sParadoxhaveonGottlobFregg’ssystem?AtfirstFregeobservedthattheconsequencesofRussell’sparadoxarenotimmediatelyclear.Forexample,“Isitalwayspermissibletospeakoftheextensionofaconcept,ofaclass?Andifnot,howdowerecognizetheexceptionalcases?Canwealwaysinferfromtheextensionofoneconcept’scoincid
7、ingwiththatofasecond,thateveryobjectwhichfallsunderthefirstconceptalsofallsunderthesecond? Becauseofthesekindsofworries,Fregeeventuallyfeltforcedtoabandonmanyofhisviews.4.WhatisRussell’sresponsetotheparadox?Russell'sownresponsetotheparadoxcamewiththedevelopmentofhistheory
