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ArtículopublicadoenWittgenstein-Studien , Internationales Jahrbuch für Wittgenstein-Forschung, 1/2010,pp.221242,NuevaYorkKassel,WalterdeGruyter,pp.221242.

ANOTHER TURN OF THE SCREW:

SCEPTICISM AND PROPOSITIONAL ANALYSIS *

Stella Villarmea

University of Alcalá, Madrid

Zusammenfassung

In order to consider whether Wittgenstein's strategy inrelationtoscepticismsucceedsor fails,Iexaminehisapproachtocertainty.Aspartofthisgeneralobjective,Iestablishacomparison between the different uses of language that Wittgenstein mentions in , and his distinctionbetweenwhathassense(ismeaningful),whatlacksit(issenseless),andwhatisabsurd (isnonsense)inthe Tractatus .Inmyopinion,thiscomparisonhasthreeadvantages:first,itallows theroleofthesocalledspecialpropositionsin On Certainty tobeclarified;second,itilluminates therelationshipbetweensomefeaturesthatbelongtospecialpropositionsin On Certainty andthe characteristicsthatdefinewhatissenselessinthe Tractatus ;and,last,itshowsthestatusofwhat someinterpreters,likePeterHacker,havedenominated‘insightfulnonsense’inthe Tractatus .

Onthenatureofnonsense,Ibelieveinanintermediatepositionbetweenontheonehand the traditional or standard interpretations of the Tractatus in this regard of, for example, Peter Hacker(1986,2000),ElisabethAnscombe(1971),RobertFogelin(1976),DavidPears(1986),and Brian McGuinness (2002a, 2002b and 1993), and on the other, the socalled new, resolute or austereinterpretationsofitofCoraDiamond(1991,2000and2004),JamesConant(1993,2000 and 2004), and Alice Crary (2000a), among others. In general, the results of this comparison support the thesis that Wittgenstein’s work, beyond its distinction in different periods, has a conceptualcontinuity.

* This paper has been written within the research project: “Metaescepticism and the present of : postwittgensteinians and neopopperians” (HUM200760464), Plan Nacional I+D , Spanish Ministry of Education. It is also the result of my participation in the following research networks:(UCM930664),(UAHCCHH2006/R06),and(UAHCCHH2006/R02). IwouldliketothankPeterHacker,AdrianMoore,DavidPears,ChonTejedor,ÓscarGonzálezCastán, HermanPhilipse,JavierVilanova,andÁngelFaernafortheirvaluablecommentsandsuggestionson previousdrafts,aswellasChonTejedorandJaneBartonforkindlyrevisingearlierEnglishversions. Specialthankstotheanonymousrefereeofthisjournalforhis/hervariousremarks. 1 1. The role of doubt in our linguistic practices

Inhislasttext, On Certainty ,Wittgensteindevelopshisideasonscepticismandthelimits of.AttheendofhislifeWittgensteinsoughttodescribethestructureofknowledgeand deriveepistemologicalconclusionsfromhislinguisticanalysisofsomeepistemicterms.Agood way to understand the epistemological entries contained in On Certainty is to reflect upon Wittgenstein'sanalysisofthenotionofdoubt.Hisreflectionsonthenotionofdoubt,itsroleinour language, and the linguistic and actionbased behaviours associated with its use allow him to distinguishknowledgefromcertainty,andtoviewscepticisminanewway.

In On Certainty Wittgensteinpointsoutthatscepticaldoubtisnot,evenifitseemsso,a radicalisationofcommondoubt.Onthecontrary,itissomethingratherdifferent.Heemphasizes that in the process which leads from doubting a particular something to doubting anything in general,ourdoubtgraduallyloosesits.Atsomepoint,itevenceasestobeintelligible:

Foritisnottruethatamistakemerelygetsmoreandmoreimprobableaswepassfromthe planettomyownhand.No;atsomepointithasceasedtobeconceivable.(C§54)

Inmyopinion,Wittgenstein'smostinterestingargumentagainstglobalscepticismliesinhis assertionthatanydoubtpresupposescommandofalanguagegame.Thatis,wecanonlydoubta propositionifwefirstunderstandwhatthepropositionmeans.IcanonlydenythatIknowthatthis isahand,ifIhavepreviouslyunderstoodwhatitmeanstosaythatthisisahand:

“Idon’tknowifthisisahand”.Butdoyouknowwhattheword“hand”means?Anddon’t say“Iknowwhatitmeansnowforme”.Andisn’titanempiricalfact—that this wordis usedlike this ?(C§306)

Wittgenstein states that understandingapropositionrequiresustoknowhowtousethat propositioncorrectly.Hence,anydoubtwemayplaceuponapropositionmusttakeintoaccount the language game in which that proposition is embedded. In other words, we cannot deny a propositionindependentlyofourlinguisticpractices:

”WhatrighthaveInottodoubttheexistenceofmyhands?” …Butsomeonewhoaskssuch aquestionisoverlookingthefactthatadoubtaboutexistenceonlyworksinalanguage game.Hence,thatweshouldfirsthavetoask:whatwouldsuchadoubtbelike?(C§24)

Asaresultofthisapproach,Wittgensteinconcludesthatdoubtingmustalwayscometoan end.Aspeakerwhoraisesquestionswithoutstoppingatsomepointdoesnotabidebytherulesthat governourcommunicativepraxis.Thegameofquestionsandanswershasitsownrules,andthey mustbeobserved.Therecomesapointwhenitmakesnosensetoraisefurtherquestions.Thus, whoever perseveres in raising objections, is not a good player of the doubting game. When the scepticexerciseshisdoubtwithoutcomingtoanend,heplaceshimselfoutofthelanguagegame thatdoubtingconsistsof.

Hence,Wittgensteinappealstoourlinguisticpracticesandthewaywelearnthem,toshow thatwecandoubtparticularfactsinparticularcircumstances,butthatwecannotdoubtthemallat 2 thesametime.Inthismanner,heshowsthatsustainingglobalscepticaldoubtimpliesrejectingour linguisticpractices.Butthisisjustnotapossibility.ItisimportanttoclarifyherethatWittgenstein doesnotrefertoamereincapacityonourpart,buttoanessentialfeatureofwhatjudgingis:

“Wecoulddoubteverysingleoneofthesefacts,butwecouldnotdoubtthem all .Would not itbe more correct to say: “we do not doubt them all ”.Ournotdoubtingthemallis simplyourmannerofjudging,andthereforeofacting.(C§232)

Adoubtthatdoubtedeverythingwouldnotbeadoubt.(C§450)

WhatwoulditbeliketodoubtnowwhetherIhavetwohands?Whycan’tIimagineitat all? What would Ibelieve if I didn’tbelieve that? So far I have no system at all within whichthisdoubtmightexist.(C§247)

Intheaboveparagraphswehaveseenthatdoubtspresupposealanguagegame.Whenwe introduceadoubtwithinalanguagegame,ithassense.Butifwetrytoconstructadoubtoutofthe languagegameinwhichweareembedded,orifwetrytobuildadoubtagainstthelanguagegame as a whole, then our doubt will lack any sense. Wittgenstein's arguments show that any doubt presupposestheexistenceofsomething thatcannotbedoubted,thatis,doubtsarepossibleonly becausecertaintyexists.Thegameofdoubtingpresupposescertainty:

Ifyoutriedtodoubteverythingyouwouldnotgetasfarasdoubtinganything.Thegameof doubtingpresupposescertainty.(C§115)

Thus we arrive to the end of Wittgenstein's critique of scepticism. The core of his argumentationliesinaskingthefollowing:Whatkindofdoubtsdoesthescepticraise?Towhat extentisitvalidtoinsertthosedoubtsinthelanguagegameinwhichweoperate?Hisanswerto thesequestionsemphasizesthefactthatsomeaspectsofourcannotbedoubted,sincethey arewhatallowtheformulationofdoubt.Thustheanalysisofthescepticaldoubt—itspremisesand consequences— allows him to prove that any doubt presupposes the existence of a domain of certaintyandhence,thatscepticismmustbemistaken.

Ofcourse,Wittgenstein'sacceptanceoftheexistenceofcertaintyforcesustoclarifywhat heunderstandsbythatterm.Iturntothispointnow.

2. The realm of certainty

2.1. Special propositions

Wittgensteinappealstoourcommonreactionagainstscepticaldoubtstoconcludethatthe sceptic'suseofdailylanguageismistaken.Werealizethatsomethinggoeswrongwithsceptical doubtswhenweareunabletosustainthem.Scepticaldoubtceasestobemeaningfultousassoon aswecannotsupportitanymore.

Thisremarkinvolvesagreatdiscovery.Atsomepointintheprocessofquestioningwhether 3 aclaimisvalid,wenoticethatourfeethavehittheground.Wefindthenthatsomepropositionsof ourlanguagestandsosquarelyinfrontofusthattheyarenolongerquestionable.Inthefollowing, wewillrefertothesepropositionsas special or privileged propositions:

That is to say, the questions that we raise and our doubts depend on the fact that some propositions are exempt from doubt, are as it were like hinges on which those turn. (C §341) 1

Thereasonwhytherecanbeneitherdoubtnorproofofthesespecialpropositionsisthatany questionorargumentwemaytrytodevelopmuststartfromtheassumptionoftheirvalidity.Thus, any inquiry about the extension of our knowledge is built upon the validity of these special propositions, since everything we judge as being knowledge presupposes them. To accept their validityisjustthewayweinquireaboutthelimitsofourknowledge.

Itisimportanttostressthat,accordingtoWittgenstein,theseprivilegedpropositionsarenot empirical.Theylieatthefoundationsofourdiscourse,andsupportalltheotherpropositionswe utter,whichbelongtothespecificlanguagegameforwhichtheyprovidethefoundations.Hence theyarenottheresultofanempiricalinvestigation,buttheymakethatveryinquirypossible.This means that whilst any other empirical proposition measures its validity in relation to privileged propositions,thelatterdonotrequirefurtherjustification:

Itmightbeimaginedthatsomepropositions,oftheformofempiricalpropositions,were hardenedandfunctionedaschannelsforsuchempiricalpropositionsaswerenothardened butfluid;andthatthisrelationalteredwithtime,inthatfluidpropositionshardened,and hardonesbecamefluid.(C§96)

Atthefoundationofwellfoundedbeliefliesbeliefthatisnotfounded.(C§253)

Ineffect,ourlanguageallowsusneithertoprovenortoquestionissueslike,forexample, theexistenceofourhandsoroftheearth―exceptontheveryfewoccasionsthatwewillmention later.Thatissobecauseeverytimeweraisedoubtsaboutthesefacts"languagegoesonholiday",to usethefamousmetaphorof Philosophical Investigations (PI§38).Inshort,thelanguagegamein whichweareimmersedpresupposestheexistenceofasetofpropositionsthatarecertain.Thisset ofpropositionsgovernsourcommunicativepracticesasrulesofdiscoursewhosefunctionisnotso muchtopassoninformationabouttheworldastoorganizeourlinguisticexchanges:

Nowmightnot“I know ,Iamnotjustsurmising,thathereismyhand”beconceivedasa propositionofgrammar?(C§57)

Inthissense,wecansaythatthespecialpropositionswearetalkingaboutconstitutethe grammarof ourlanguage,thustheycanalsobenamed“grammaticalpropositions”.Admittedly, sayingthatspecialpropositionscanalsobenamedgrammaticalpropositionsfacesthefollowing

1Ihavequotedhere,andusedingeneral,D.PaulandG.E.M.Anscombe’stranslationof“Satz”as “proposition”,althoughithasbeenarguedthatthistranslationcanleadtoseriousproblemsinsome cases. 4 difficulty,namely,thattheexpression“grammatischerSatz”appearsonlyinC§§57,58―firstly withinaquestionandsecondlywithinaconditionalsentence.Thereisthereforenotmuchtextfor interpretation. Yet, the secondary literature has debated whether or not to identify special propositionswithgrammaticalpropositions. 2Insections3.2and4belowIintendtoshowtowhat extentthisidentificationworksandtowhatextentitappliesnofurther.

2.2. Meaningful, nonsense and senseless

These reflections suggest that in On Certainty Wittgenstein constructs a tripartite classificationofthepropositionsofourlanguage―thatis,oftheapplicationsofsentencesor,to putitanotherway,ofsentencesincertainuses―,asfollows:

 First,empiricalpropositions,whosemeaningandtruthvaluedependuponthecontext inwhichweusethem.Thatisthecaseofthesentence"Iknowthisismyhand"whena victimuttersitafterbeingunharmedinanaccident/explosion.

 Second,propositions,whichwemaycalldogmatic,thatlackmeaninginanyrelated context.Thisisthecase,forexample,ofthesentence"Iknowthisismyhand"whenit isintroducedinaphilosophicalconversationwiththeaimofrefutingthesceptic.

 Third, propositions that seem to be empirical but that, in certain contexts, become specialorgrammaticalpropositions.Suchisthecaseofthesentence"Iknowthisismy hand" when we use it in the context of a philosophical analysis about what the discussionwiththescepticshows.

The above distinctions about the way a sentence can have meaning or lack it play an essential role in Wittgenstein's argument. Empirical propositions present no problem of interpretationwhentheyarepronouncedintheappropriatecircumstances,sincethentheymakefull sense,i.e.,theyaremeaningful.Dogmaticsentencescanalsobestraightforwardlyevaluated,since accordingtoWittgensteintheyareclearlyabsurd.Theproblemarises,however,inrelationtothe socalledspecialpropositions.

Thus,tounderstandthewayWittgensteinsolvesthequestionofmeaninginrelationtothe special propositions we are talking about, I suggest we turn to a distinction that he drew in the Tractatus between three types of proposition: meaningful ( sinnvoll ), nonsensical or absurd (unsinnig ), and senseless ( sinnlos ). Examples of the first type (meaningfulpropositions) are any propositionthatbelongstothenaturalsciencecorpusandanypropositionthatbelongstoordinary language. Examples of the second type (nonsensical propositions) are the propositions that compose the Tractatus (the socalled tractarian propositions) as well as any other proposition belongingtometaphysics,ethics,andaesthetics.Examplesofthethirdtype(senselesspropositions) arelogicaltautologiesandtheircontradictorynegations.

2Cf.,forexample,Kober1993,315. 5 In my opinion, the tripartite distinction drawn by the Tractatus between meaningful, nonsensical, and senseless propositions may help to understand some features of the special propositionsthatattractedWittgenstein’sattentioninthenotesthatmakeup On Certainty .There, Wittgensteintackledthesphereofcertaintywhenreflectingupontheconditionsofintelligibilityfor some propositions. He discovered that the same sentence can have different conditions of intelligibility, depending on the context in which the sentence is uttered. Thus, whether a propositionlike"Iknowthisismyhand"makessenseornotdependsuponthecircumstancesin whichitispronounced:

I)Ifweintroducethissentenceinadailyconversationasanempiricalobservation—for example,ifavictimuttersthesewordsafteropeningapackagecontainingabomb—,thenit will be meaningful ( sinnvoll ), and will have a truth value ascribed to it. This will be a perfectlylegitimateapplicationofthissentence.Itwillthusbeameaningfulpropositionin anempiricalcontext.

II)However,ifwepronouncethesentenceinaphilosophicaldiscussion,andinterpretitas if it were an empirical proposition —as both the sceptic and G. E. Moore do—, the propositionbecomesnonsense( Unsinn ).Itisthusparticularapplicationsofthesentencein particular contexts —which I have here referred to as dogmatical applications— which convertthistypeofpropositionsinnonsensical.

III) Finally, if we use the sentence in the context of a philosophical discussion and we interpretitasaspecialpropositionoragrammaticalrule—asWittgensteindoes—,then— according to my thesis— it will, strictly speaking, lose its empirical sense, and acquire features that resemble, on the one hand, the senseless ( sinnlos ) propositions and, on the other,thenonsensical( unsinnig )propositions. 34

3OnemightobservethatincircumstanceIIthespeaker(thatis,Mooreorthesceptic)usesthesentence, whileincircumstanceIIIthespeaker(thatis,Wittgensteinoranyonewhofollowshislineoffor thesakeofphilosophicalanalysis)doesnotreally use it―heorshesimply quotes it.Ofcourse,strictly speaking,quotingisalreadyawayofusing,butIhopethatifIphrasetheobservationasadistinction betweenusingandquoting,thiswillhelpustoilluminatetwoobservations.First,thefactthatwecanuse thesentenceinthewaywehavedenominatedhere quoting ,revealsthatthefunctionoftalkingabout specialpropositionsisnotempirical(tocommunicatecontentorknowledgeabouttheworld)but philosophical(todiscovertherealmofcertaintyandtoreflectuponitsexistence).Wecouldevensay that“quoting”aspecialpropositionisakindofmetalanguage.Thusweengageinmetadiscoursewhen wereflectuponthenatureandstatusofspecialpropositions.Forexample,whenwediscover―as Wittgensteindoes―thattheyareneithertruenorfalse,thattheycanneitherbeprovednorfalsified,that theirexistenceisnecessaryfortherestoflanguagetoexist,oranyotherattempttodescribewhatthey are.Second,thefactthatwecanusethesentenceinthewaywehavedenominatedhere quoting ,reveals alsothatwecannotentertherealmofcertaintythroughanintellectualorvoluntaryact,andjust being or living thereonpurpose.Wejustcannotgointotherealmofcertaintybecausewearealwaysalready withinit.Nonetheless,wecanindeedtalkaboutit,asWittgensteindoes.Wearecertainthatitexists,but wecannotbesureofwhatitislike.Wittgensteinevengivesveryseriousconsiderationtothepossibility thattherealmofourcertaintiesmightnotbefullydescribed(C§102).Thisfactmightalsoexplainwhy youcannotprove( erweisen )tosomeonewhoinvestsinaquitedifferentsetofbeliefsthatheiswrong. 6 It is now necessary to develop further my interpretative proposal. Following the interpretativehypothesisthatIhavepresented,somefeaturesthatdefinespecialpropositionsin On Certainty arecommontothedefinitionofsenselesspropositionsinthe Tractatus .Toilluminate them,Ishallexploreinmoredetailthecomparisonbetweentheroleofspecialpropositionsin On Certainty andtheroleofcharacteristicallysenselesspropositionsinthe Tractatus ,namely,logical propositions,insection4.Iwillthendealwiththeanalysisofthekindoffeaturesthatallowfora comparisonbetweenspecialpropositionsandnonsensicalsentencesinsection5.

3. Resemblance between senseless propositions in TLP and special propositions in OC

Inthe Tractatus Wittgensteinexplainedthatlogicalpropositionsdidnothavesense.Butin relationtothemheintroducedtheimportantdistinctionbetweenbeingnonsensical( unsinnig )and beingsenseless( sinnlos ).Logicalpropositionsarenotabsurd,butsenseless,thatis,theylackany meaning at all. This assertion becomes clear when we remember his definition of logical propositionsastautological(TLP6.1)andcertain(TLP4.464).Thedescriptionimpliesthatnothing ofwhatmayhappenintheworldcaneveraffectthem,whetherinconfirmationorrefutationof them(TLP6.1222).Hethussustainsthatlogicalpropositionsdonotconveyanyinformationbut saynothing(TLP6.11).Healsoclaimsthattheylacksemanticcontentorhavezerocontent.[A parallelanalysisistobeappliedtocontradictions.]

We can now apply the definition of logical propositions to our understanding of special propositions in On Certainty . In the Tractatus , Wittgenstein claims that logicalpropositions are certainandtautological,lacksemanticcontent,donotconveyanyinformation,andmusttherefore beconsideredmeaningless.Inasimilarfashion,in On Certainty Wittgensteinconsidersthatspecial propositionsformacertainandunchangeablestructure,donottransmitanyinformationeither,and

Themostyoucoulddoistrytoconverthim( bekehren )toyourownworldview(C§92). 4Itmightwellbethecasethatwhatthetwoobservationsmentionedintheabovefootnoteshowis“the aporiathatanycritical―anyphilosophythataimsatdelimitation―meets,i.e.,theneedto trespass,intheveryactofdelimiting,thoselimitsthataresupposedlyestablishedasinsurmountable(in thiscase,whensettingthelimitsofthought,wewouldhavetobeabletothinkaboutwhatitcannotbe thought)”(Sanfélix2008,6).AccordingtoSanfélix,Wittgensteinengagesincriticalphilosophyforhe aimsatestablishingthelimits(notsomuchofthoughtas)oflanguage.Thusthedifficultiesmentioned aboveofdwellingorenteringtherealmofcertaintywouldjustbeanotherwayofphrasingtheaporia.In ordertobeabletosetthelimitoflanguage,wouldwenotneedtoenterthefieldofwhatcannotbesaid, whatisunsayable?Howelsecouldwethentalkaboutthesayable(meaningful),exceptbyappealingto theunsayable(nonsensical)?(Cf.alsoGonzálezCastán2001,195196).Wittgenstein’senigmaticclueto understandinghisownstrategyiscontainedinhisfamousremark:“Mypropositionsserveaselucidations inthefollowingway:anyonewhounderstandsmeeventuallyrecognizesthemasnonsensical,whenhe hasusedthem―assteps―toclimbupbeyondthem.(Hemust,sotospeak,throwawaytheladderafter hehasclimbedupit)”(TLP6.54).Inrecentyearsanintensedebateamongscholarshasarisenonhow tointerpretthisremark.BeingabletofollowWittgenstein’strackthroughthewoodsofcritical philosophydependsuponit.Iwillcomebacktothisissueagaininsection5. 7 can therefore also be considered meaningless—always taking into account that their being meaninglessultimatelydependsontheirbeingutteredinaparticularcontext.

Up to here we have resumed some of the similarities between logical and special propositions,whichmightleadustounderstandthelatterasbeingsenseless.Ifwepursuedthis path,weshouldthenhavetotrytothinkofsomethinglikeasenselesscertainty!Butwemustbe very careful at this point. These reflections might lead us to believe that the role of special propositions in On Certainty is similar to the role that logical propositions played in an earlier periodofWittgenstein'sintellectualdevelopment.However,weshouldnotbetootemptedbythe advantagesof such an identification since there are important differencesbetweenbothtypesof sentences.Inmyopinion,thesedifferencesexhibitpreciselytheextenttowhichthepropositional treatmentoftherealmofcertaintyposesinsurmountabledifficulties.

OneofthedifferencesisWittgenstein'semphasisthatthefactthatspecialpropositionsare certaindoesnotimplythattheyareeithertrueorfalse.Theimplicationofthisassertionisthatthe specialpropositionsin On Certainty arenottautologiesinthesenseinwhichlogicalpropositionsin the Tractatus are.Attheendofhislife,then,Wittgensteinwasconvincedthatadiscussionabout truthorfalsehooddidnotapplyinthecaseofspecialpropositions.However,ifweruleoutthe possibility of special propositions’ being true or false, it will not be possible to consider them "propositions"inastrictsensesinceaccordingtothestandarddefinitionapropositionisalinguistic expression that canbear a truth value. This, of course, has to do withthefactthat,bythetime Wittgensteinwrotethenotesthatmakeup On Certainty ,hehadalreadyabandonedthatdefinition. ForthesocalledsecondWittgenstein,havingatruthvalueisneitheranecessarynorasufficient condition for being a proposition ―there are many kinds of language games and truth and falsehood do not apply to all of them, for example, questions, exclamations, orders, or prayers. Having abandoned the old notion of proposition, special propositions can still be called “propositions”,despitethefactthattheyareneithertruenorfalse.But—andthisismypoint— beingneithertruenorfalse,theycannotnotresembletautologies,atleast,inthesenseinwhichthe latterareconceivedin Tractatus .5

Asecondfeaturethaturgescautionwhencomparingthetwonotionsfromdifferentperiods ofWittgenstein'scareeristhefollowing:whilelogicalpropositionsarenotusuallyemployedinthe contextoflearning,somespecialpropositionscanbeusedforthatpurpose.Thus,whileitdoesnot makesensetotellachild"Itrainsoritdoesnotrain"toteachhersomethingaboutrain, 6wecan

5 As regards this point, Javier Vilanova has pointed out to me that, in texts like Philosophical Investigations or Philosophical Grammar , Wittgenstein suggests that tautologies are neither true nor false, for they belong to the grammar of language. Vilanova further considers that it would thus be correcttotraceananalogybetweentautologiesandsentenceslike“TheworldexistedbeforeIwasborn” or “This is my hand”. I accept that theanalogybetween tautologies and special propositions can be traced within thesocalledsecondWittgenstein.Intheabovesection,however,myanalysisisaimedat theresemblancebetweenspecialpropositionsin On Certainty andtautologies in Tractatus . 6 Adrian Moore once pointed out to me an amusing footnote in Brian McGuinness’s biography of Wittgenstein.InthemaintextMcGuinnesswrites:“InWittgenstein’sexample,Iknownothingaboutthe weather when I know that it is either raining or not raining”. Then in a footnote, after giving the reference,headds:“HehadbeenoutofEnglandforsometimewhenhewrotethis”(McGuinness1988, 8 teachhersomethingifwesay"Thisisahand".

Of course, saying to a child “Either it is raining or it is not raining” could be part of a programmetoinculcateinherthepracticeofclassicallogic.Furthermore,itcouldbeawaytoteach herhowtousethewords“or”and“not”,thatis,awaytoteachherthegrammarofourlanguage.In thiscase,therewouldbenosignificantdifferencewiththepedagogicaluseof“Thisismyhand”. Thus,bothsentencesarenonsensicalifpronouncedasempiricalpropositions(circumstanceII)but conveyinformationaboutthewayweusecertainterms―i.e.thelogicalconnectives―ifweutter themtoilluminateaparticularlanguagegame(circumstanceIII).Inourpreviousconsiderationswe assumedthatspecialpropositionsaremeaninglessanddonotconveyanyinformation.Wecannow verifythatspecialpropositionsdonotlacksenseandarenotmeaningless,butconveyinformation aboutthewayweusecertainterms.Again,thisdifferencehighlightsakeyroleofthesocalled specialpropositions,whichdoesnotfitwellwiththeircharacterizationassimple"propositions".

This last comment takes us on a new trail; so I now turn to develop the alternative interpretativehypothesisofmyargument,thatis,theanalysisofspecialpropositionsasnonsensical (unsinnig) .

4. Resemblance between nonsensical propositions in TLP and special propositions in OC

4.1. Traditional vs. New interpretations of nonsense

Thenonpropositionalcharacterofcertaintyisshownbytheideathatthesocalledspecial propositionsdonotdepictfactsabouttheworldbutregulatetherulesofourlanguage.Theysay something about how we think, about our symbology. This idea helps me to deepen the comparative analysis between the different uses of language in On Certainty and the types of propositioninthe Tractatus thatIamproposing.Intheprevioussectionwesawwhichaspectsare sharedbyspecialandsenselesspropositions,andwhichonesdistinguishthem.Inthissectionwe willconsidertherelationshipbetweenspecialandnonsensicalpropositions.

Inrecentyears,afiercedisputehasarisenamongscholarsoverthenatureofnonsensein the Tractatus . On the one hand, there is the mainstream, traditional or standard interpretation, paradigmatically defended by Peter Hacker (1986, 2000), and also supported by Elisabeth Anscombe (1971), Robert Fogelin (1976), David Pears (1986), and Brian McGuinness (2002a, 2002band1993),nottomentionRussell,Ramsey,andNeurath.Ontheotherhand,thereisthe new, resolute or austere interpretation defended by the socalled group of “the new Wittgensteinians”,amongwhomCoraDiamond(1991,2000and2004),JamesConant(1993,2000 and2004),andAliceCrary(2000a)standout.Itiscertainlyadebaterifewithfruitfulideasand controversies.Withrespecttotheargumentofthisessay,itisimportanttobearinsomeofthe thesesoftheopposingpositions:

308).Wonderful! 9 1) The mainstream, traditional, or standard interpretation sustains that nonsensical propositions violate the rules of logical syntax and the limits of meaning. They are pseudopropositions or conceptual impossibilities that do not say anything —like the senseless propositions—nordotheyshowanythingabouttheformorthecontentoftheworld—contraryto thesenselesspropositions.Now,thisapproachemphasisesthatWittgensteinacceptsthattheterm ‘Unsinn’ (translated into English as ‘nonsense’) is used to exclude different things for different reasons.Towelcomethispolarity,Hacker(1986,22)talksof:

a)Overt,patent,manifest,notorious,orevidentnonsense

b)Covert,disguised,orlatentnonsense

Tobackuphisdistinction,heappealstosometextualevidences,foreigntothe Tractatus , where Wittgenstein says, for example, the following: “ Was ich lehren will, ist: von einem nicht offenkundingen Unsinn zu einem offenkundigen übergehen ” (Anscombe’s English translation of thisquoteis: “My aim is: to teach you to pass from a piece of disguised nonsense to something that is patent nonsense ”) (PI§464).Patentnonsensedoesnotrequireanyoperationtobediscoveredtobe such. Examples of this type are, of course, absurd expressions like “Err to ja”. But also an expressionlike“‘Isthegoodmoreorlessidenticaltothebeautiful?’fallsintotheclassofovert nonsense” (Hacker, 1986, 18). However, most of philosophy, Hacker says, is covert nonsense because it does not violate the boundaries of sense in an obvious way, but rather violates the principles of the logical syntax of language in a way that is not evident indailylanguagetoan untrained mind. As for the philosophical operations that allow us to capture or to discover the covert,disguised,nonmanifestnorevidentnonsense,thefollowingtextscanalsobeconsulted:PI §524;AWL64;LWL98.Inthisregard,“theonlydifferencebetweenordinaryandphilosophical nonsense is that between patent nonsense which causes no confusion since we recognize it immediatelybythe“jingleofwords”,and latent nonsense,“whereoperationsarerequiredtoenable ustorecognizeitasnonsense”(Glock1996,263).

Moreover,Hackeraddsthattherearetwotypesofcovertnonsense:

b.i)Misleading,incorrect,insightless,absolute,orgibberishnonsense

b.ii)Illuminating,correct,insightful,interesting,ornongibberishnonsense

Letusexaminethenuancesthatseparatebothtypes: b.i)Propositionsbelongingtothefirsttype―covertnonsensicalsentencesthataremisleadingor absolutenonsense―violate,asnonsense,therulesoflogicalsyntaxandtheboundariesofsense; they are thus pseudopropositions or conceptual impossibilities. A case of misleading nonsense wouldbe “Err toja”, an example that WittgensteinusesinhisCambridgelectures. Thelackof understanding of how the principles of logical syntax function in their case leads to confusion regardingtheessentialnatureofanypossiblesymbolism.Inotherwords,theyarenonsensebecause theydonotrespecttheconditionsofpossibilityofanyrepresentation.“Thesourceoftheerrorof past philosophy lies in its failure to understand the principles of the logical syntax of language which are obscured by grammatical forms. These principles reflect the essential nature of any 10 possiblesymbolism,theconditionsoftheverypossibilityofrepresentation.Failuretograspthem engenders the illusion that one can say things that can only be shown. This in turn leads to misleading nonsense” (Hacker, 1986, p. 19). In the Wittgensteinian scheme of thought, many philosophicalpropositionsthattalkaboutaesthetics,ethics,religion,orpersonalidentity,likefor example,theexpression“Noonecanhavemythought”,incurinthistypeofmistakesandthus belongtothetypeofcovertandmisleadingnonsense. b.ii)Propositionsbelongingtothesecondtype―covertnonsensicalsentencesthatareilluminating, correct, valuable, interesting or insightful nonsense― also violate the rules of logical syntax of languageandtheboundariesofsense;theyarethus,likethepreviousones,pseudopropositionsor conceptualimpossibilities.Acaseofilluminatingnonsensewouldbe“Theworldisallthatisthe case”,theopeningremarkofthe Tractatus .Now,theseexpressionsstandoutbecause,evenifthey arebasedonmisunderstandingsoflogicalsyntax,theymanagetoexpresssomekindofinsightinto theworkingsoflogicalsyntax.Inthatrespect,theyconveysomekindofcomprehensionaboutwhat makeslanguagepossible;inotherwords,theyexpresssomethingimportantaboutwhatunderpins it. “Illuminating nonsense will guide the attentive reader to apprehend what is shown by other propositionswhichdonotpurporttobephilosophical;moreoveritwillintimate,tothosewhograsp whatismeant,itsownillegitimacy”(Hacker,1986,1819).Theyarepseudopropositionsthattryto saywhatcanonlybeshown.Statementsfromthe Tractatus like“Objectsaresimple”(TLP2.02) fallunderthisheading;theyareexamplesofinsightfulcovertnonsense.Fromthisperspective,the Tractatus ’ philosophicalpseudopropositionsareinterestingnonsensebecausetheyilluminatewhat can’tbesaid,butcanonlybeshown.Inaspecialway,theyexpresscorrectlysomethingwhichis ineffable; they are correct unsayables, but correct nonetheless (TLP 4.12ss., 5.534s., 6.54s.; NB 20.10.14).

2) The stream of alternative, new, austere, or resolute interpretation maintains that no nonsensepropositionisreallyaproposition.Philosophicalsentenceslike“Objectsaresimple”or “Noonecanhavemythought”arenonsenseinthesamewayas“Errtoja”.Alltheseexpressions resultfromamistakeinlogicalconstruction,althoughinthefirstcasethismistakeisnotobvious andhastobeclarified.Nonsensicalsentencesdonotmanagetosayanythingbecausetheyhappen nottobebuiltinalegitimateway.“TheideaisthatwhenWittgensteinsaysthatacombinationof wordswearetemptedtoutterinphilosophyisnonsense,heissaying,notthatweknowwhatthe wordsattempttosayandthatthatcannotproperlybeputintowords,butinsteadthatthosewords donotsayanything,thattheyhaven’t(yet)beengivenanysignificantuse”(Crary,2000b,67).As aconsequence,thispositiondefendsthatnonsenseneverconveysinsight;nononsenseprovides comprehension, captation or ellucidation at all. There is thus no useful, important, interesting, profound or ineffable nonsense. None of them, say, illuminates. To phrase it perhaps more suggestively:itisnotpossibletobelocatedintheexternalpointofview:theladdercannotcross theborder.

4.2. My interpretation: a middle path

Inrelationtothedebatebetweenthestandardandnewpositions,theargumentthatIpresent inthisessay—theanalysisoftheextenttowhichspecialpropositionsin On Certainty resemble 11 or otherwise nonsensical propositions in the Tractatus — leads to the drawing of the following conclusions. I have argued, firstly, that the propositions that are certain to us are important or valuablycorrect.Inparticular,thatwhentheproposition“Iknowthatthisismyhand”worksasa special proposition, it resembles insightful nonsense (a nonsense of the type b. ii). My thesis capturestheideathatin On Certainty Wittgensteinpointsoutthatspecialpropositionsdonotsay anythingabouttheworld;theydonotyieldknowledge,theyyieldakindofunderstandingofthe world. I think this description of special propositions in On Certainty helps to illuminate the statusofinsightful,valuable,orinterestingnonsenseinthe Tractatus .Thelatterexpressinsights into the workings of logical syntax, they say something about how we think, about our symbology;theyshowsomethingabouthowlanguageispossible,andaboutwhatunderpinsit. Frommypointofview,hingepropositionsarenonsensicalbutconveyvaluableandilluminating insightsintowhatmakeslanguagepossible—whenphilosophyhelpsustonoticetheirexistence. Theroleofsuchspecialpropositionsin On Certainty couldthereforeberelatedtotheroleof insightfulorilluminatingnonsenseinthe Tractatus .Onthestatusofphilosophicalpropositions, On Certainty closesthecirclethatthe Tractatus hadopened. 7 Inaway,theconnectionIhaveindicatedsupportsthe new Wittgensteinians ’proposalthat thereisa significant continuityinWittgenstein’sthought,againstmoretraditionalinterpretationsof hiswork“insofarassuchinterpretationsfurnishanarrativeaboutthedevelopmentofhisthought which,whileitleavesroomforimportantsimilaritiesbetweentheviewheholdsatdifferenttimes, accentstheideaofa decisive breakinhismodeofphilosophizingbetweenthe Tractatus andhis laterwritings”(Crary,2000b,12). Secondly,letusrememberthat—asIpointedoutearlierinparagraph3.2,circumstanceII— the same sentence (“I know that this is my hand”) in another application (the same sentence in anotheruse)wasforWittgensteinacaseofmisleading,absoluteorgibberishnonsense(anonsense ofthetypeb.i).Sothedogmaticuseofthesentence“Iknowthatthisismyhand”,intendedasa sortofMoorianproofagainstthesceptic,isaclearlyabsurdlanguageuse.

Inconclusion,myargumentidentifieswhichaspectsofspecialpropositionsremindusof the nature of misleading, gibberish, or complete nonsense (type b.i. nonsense), and which other featuresinsteadmakethemmoreakintoilluminatingorinterestingnonsense(typeb.ii.nonsense). Inconsequence,myinterpretationoccupiesthemiddlegroundbetweenthetraditionalandthenew interpretationsofthe Tractatus inthisregard.ForIaccept,ontheonehand,thattherearetwotypes ofnonsense,whileIalsothink,ontheother,thatonegroupofpropositions(thespecialpropositions

7 The similarity between the special propositions of On Certainty and the insightful nonsensical propositions of the Tractatus canalsobeexpressedbysayingthattheybothseem to be prima facie contingent,whileinfacttheyareunconditionallyvalidpropositions.When“Iknowthatthisismyhand” worksasaspecialproposition,itiscertain,thatis,itisunconditionallyvalid―nothingthathappensin theworldcanalteritsvalidity.Inthesameway,anypropositionthatinvolvesformalconceptsinthe Tractatus ―forexample,anyofthe Tractatus’ statementsthatarticulatetheontologyofthework,i.e. “Objects are simple” or “The world is all that is the case”― are unconditionally valid. “Unlike a meaningfulandgenuinescientificpropositionsuchas‘Theworldismatterandantimatter’,whosetruth iscontingentandthereforerelatedtowhat de facto bethecase,‘Theworldisallthatisthecase’is unconditionally valid (or true). The world is all that is the case independently of what the case be” (Sanfélix2008,13). 12 thatarecentraltoWittgenstein’sconcernin On Certainty )sharefeatureswithbothtypes;inother words,thatdependingonthecontextofapplication,oneandthesamesentence(forexample,“I know that this is my hand”) can be interpreted as being gibberish (i.e., a dogmatic use of an antiscepticalproof)orasbeinganinsight(i.e.,aproperphilosophicalusethatletsusdiscoverthe realmofcertaintyandreflectuponit.)

5. Certainty and facticity

WhenWittgensteinreflectsonthenatureofthespecialpropositions,herealizesthatwhatis trulyimportantaboutthemisnotsomuchthattheylooklikepropositions,butthattheycontainthe norms that govern our discourseandbehaviour.Wemustthereforeconcludethatwhatwehave called special propositions do not, in fact, belong to our language as an additional element,but ratherconstitutewhatbindslanguagetogether.Thiscorroboratestheviewthat,inthelastanalysis, Wittgensteinfavouredanonpropositionalcharacterizationofcertainty.

It is at this stage that he appeals to a set of different phenomena that constitute the foundationofourthoughts,expressionsandactions.Hereferstothemwithdifferentnameslike,for example,theinheritedtradition,thecommunityoforigin,ourbehaviour,ouranimality,andeven ourmythology,allofwhicharenonintellectualphenomenathatmayperhapsbesubsumedunder theheadingof"facticity".Wittgensteinusestheterm"certainty"torefertothatwhichsupportsall ourthoughts,expressionsandactions.Theexplorationoftherulesoflanguagerefersustoarealm beyond language, which cannot be analysed further. The inquiry comes to an end when we understandthatthefieldofcertaintyexistsandconstitutesus,butthatwecannotmakeitsnature explicit.Intheend,whatiscertainandwhyitiscertain,remainsbeyondourunderstanding.

6. Evaluation of the sceptical position

TheconclusionswehavereachedabovecanhelpusunderstandWittgenstein'sresponseto scepticism. As we have seen, Wittgenstein rejects the validity of the sceptical claim "I doubt whethertheworldexistsbecauseIdon'tknowwhetherIamdreamingthattheworldexists".His argument shows that the sceptic's use of the terms "doubt", "know", "dream", and "world" is completely different from the normal use of the terms in the sceptic's community of origin. Wittgenstein'sanalysisrevealstheextenttowhichthepropositionsthatthescepticseekstoattack function as certainties in our language. By means of this criticism Wittgenstein denies that an individualcouldstatescepticaldoubtsaboutaparticularuseoflanguagesincethecommunityof speakersasawholelegitimisesthisuse.

Wittgenstein'sargumentinthisrespectisconvincing.Asaresult,itisgenerallybelieved that his linguistic analysis demonstrates that the sceptical challenge is no longer dangerous for epistemology.Inmyview,however,thisconclusionisrathersuperficialandtoooptimisticsince Wittgenstein's approach to knowledge contains gaps that leave room for doubt. Wittgenstein succeeds in his reductio ad absurdum ofscepticismwhenitisintroducedatanindividuallevel 13 withindailypractice:IcannotsaymeaningfullythatIdonotknowwhetherthisisahand,whileI am using it to type this paper. But it is less clear whether Wittgenstein's position can counter successfullyamoreseveretypeofscepticism.BythisImeanthekindofscepticismthatdoesnot involvecertainlinguisticpractices,butthesystemoflanguageitself.

Wittgensteindiscoveredtheimportanceofthissecondtypeofscepticismwhenherealized thatitsspecificityisnotgraspedwhenthescepticalattitudeisdescribedasameregeneralizationof empiricaldoubt.Onthecontrary,thepeculiarityofscepticismliesinthewayitforcesustoenquire abouttherulesofuseofourlanguage.Thistypeofquestioningoftheuseoflanguagewithina communityappears,forexample,whenweaskourselveshowtoidentifythepropositionsthatare certaintiesinthatcommunity.Despitehiseffortstorejectscepticismatthislevel,Wittgensteinwas eventuallyobligedtoadmitthat,inthelastresort,itisimpossibletoidentifythesepropositions.

ThereasonbehindthisconclusionisWittgenstein'sthesisthatthesameexpressioncanhave meaningincertaincircumstances,whereasithasnoneinothers.Thusitmakessensetosay"Iknow thatIhaveahand"afteropeningapackagecontainingabomb,butmostofthetimetheproposition "Ihaveahand"hasanascriptionofcertainty.Fromthisfactwecanconcludethatanyquestioning aboutwhetherapropositionismeaningful,aboutwhetheritcanbeknown,andalsoaboutwhether itiscertain,demandsfurtherexplorationofthecircumstancesinwhichthepropositionisuttered. Therefore,theproblemthatthethesisofthediversityofsensesraisesishowtoknowinwhich circumstancesitisorisnotappropriatetoimmerseoneselfinalivelydiscussionaboutthemeaning ofapropositionoraboutitsdescriptionascertainorasknowledge.

Now —and this is a delicate point— when we try to clarify, which circumstances correspond to which language games, a serious obstacle appears. The setting requires us topay attention to the conditions of use of our sentences or, what is the same, to appeal to "normal circumstances" as the framework into which our declarations fit. At this point, however, Wittgenstein recognizes that we do not possess —and even more significantly, that we cannot possess—anymethodtodistinguishunderwhichcircumstancesaclaimtoknowledgeorcertainty iscorrect:

If, however, one wanted to give something like a rule here, then it would contain the expression“innormalcircumstances”.Andwerecognizenormalcircumstancesbutcannot preciselydescribethem.Atmost,wecandescribearangeofabnormalones.(C§27)

Thepropositionitselftellsusneitherwhenitsinsertioninsomecontextsispertinent,nor whenitissuperfluous.Besides,anyrulewemaydevisetodeterminethecontextofusewillhave, accordingtoWittgenstein,anopencharacter.Ifthe"normalcircumstances"underwhichwemay useoursentencescannotbespecified,thatis,iftherearenorulestouseourpropositions,thenitis notpossibletoidentifywhichpropositionsarecertain.

TheseconsiderationsleadustoconcludethatWittgenstein'spositioncannotrejectatypeof scepticismwhoseobjectiveistowarnusoftheimpossibilityofunderstandingourownpositionin the world. This raises an interesting issue, namely, Wittgenstein's recognition of the limits of philosophical reflection. In this sense, one consequence of his analysisofepistemictermsishis thesisthatitisimpossibletojustifythelogicbehindourlanguage,andhence,wecanonlyassume 14 itsfacticity.

Now it is precisely on this issue that Wittgenstein gives the definite and certainly most polemical turn of the screw in his argumentation. He argues that the temptation to seek the foundations of our language games by looking for their finality or their essence is mistaken. Linguistic analysis comes to an end when we recognize the existence of propositions that are certain.Thismeansthatitisnotnecessarytojustifytheircertainty;onthecontrary,itissufficientto understand that they exist. In fact, this is the only movement that is valid philosophically. Ultimately,theideathatwecannotjustifyoursystemofmeaningsdoesnotimply,accordingto Wittgenstein,thatwecanposedoubtsaboutit.Itmakesnosensetothinkitmightbefalse,inthe samewaythatitmakesnosensetothinkitmightbetrue.

7. The limits of language and the philosophical task

Wittgenstein'sassertionthatfirstphilosophyormetaphysicsisimpossible,andthatwedo not need to worry about this fact,inspires two different considerationsaboutthepossibilitiesof successofglobalscepticism.Ontheonehand,onecouldconsiderthattherealmofcertaintyshapes usinsuchawaythatwelackthenecessaryperspectivetograspitstruthfulnessorfalsehoodfroma higher and neutral point of view. This ties in with both the fact that certainties are gradually acquiredinchildhood(OC§§94,279)—hence,atatimewhenjudgmentsregardingtheirtruth valuedonotgenerallyarise—andthefactthatafterwardschangesintherealmofcertaintiesarenot introducedindividually,butsocially(OC§512).Thisapproachwoulddefineglobalscepticismas unintelligible;aglobalscepticaldoubtwouldnotbeabletoeliminateourcertainties,sinceitcould notgobeyondtheacceptanceof,atleast,someofthem.

Ontheotherhand,itismyclaimthattosupposethatthereisanunattainableandirrefutable coreofcertaintyimplies,precisely,thatwearebeggingthequestionagainstscepticism.Fromthis perspective,thepostulationofafieldofcertaintieswouldbeadebatablestrategythatcannotmeet itsobjectiveofrefutingscepticism.

Theabovedilemmaleavesuswiththeproblemofdecidingwhichofthetwopositionsis correct, that is, with the difficulty of determining to which kind of criterion we could appeal in ordertochoosebetweenthem.Inmyopinion,oncewehavearrivedatthispoint,anydecisionwe mightmakewouldinvolvebeggingthequestion.Inotherwords,thereasonsbehindourdecisiondo notneedtobeacceptedbythetwopartiesinvolved,i.e.,thescepticandhisopponent.Wittgenstein cannotprovehisconclusions.Thereadercanacceptorrejecthispresuppositions.Atthispoint,one mightbetemptedtosaythathisdecisionwillnolongerbebasedonreasoning.Thustheplaying field would no longer be a rational discussion. In accordance with a recurrent feature of Wittgenstein'sthought,onemightventurethehypothesisthatthenatureofthisproblemis,infact, ethical,inthesenseofbeingrelatedtoalifechoiceoranattitude.

To conclude, I would like to highlight a feature that has traditionally defined the philosophicaltask,i.e.,thefactthatthesometimesasksaquestionwithoutawaitinga response, or without aspiring to achieve it. In the eyes of the traditional epistemologist, the 15 discussionaboutscepticismshowsthattheinquiryaboutknowledgeislegitimate,evenifthereis nodefiniteanswertoit.Wittgensteinbelongstothatsametraditioninwhich,whilethephilosopher iswellawareofthelimitsofhumanknowledge,hestilltakesseriouslythepossibilityofinquiring. Inrelationtothispoint,weshouldrecallthe Tractatus ’importantcategoryofnonsense( unsinnig ) butvaluable.Itmaybethattheproblemofscepticismbelongstothesamefieldofrealityheusedto refertoasthemystical.

In any case, Wittgenstein's discussion about scepticism shows, in my opinion, that philosophicalquestionsareworthresearching.Ourfinalreactionmaybesilence,buttoarriveat thisconclusionitisnecessarytocoverbeforehandalongargumentativepath.

In the Tractatus Wittgenstein develops a logical analysis of language, and concludes by showingthatlanguagecannotaccountforitsfinalpremises,namely,thefacticityoftheworld.The paththatthelateWittgensteincoversputsintopracticehisthesisthatphilosophyisnotatheory,but anactivity.Inotherwords,philosophycannotyieldknowledgeaboutthefactsoftheworld;through themethodofconnectiveanalysis,itcanratheryieldunderstandingofourlogical,grammaticaland thoughtstructures.

LITERATUR Anscombe,Elisabeth(1971), An Introduction to Wittgenstein’s Tractatus ,London:Hutchinson. Conant,James(1993),“Kierkegaard,Wittgenstein,andNonsense”,in:T.Cohen,P.Guyer,andH. Putnam (eds.), Pursuits of Reason. Essays in Honor of , Lubbock: Texas TechUniversityPress. Conant,James(2000),“ElucidationandNonsenseinFregeandEarlyWittgenstein”,in:A.Crary andR.Read(eds.). Conant,J.andC.Diamond(2004),“OnReadingthe Tractatus Resolutely”,in:M.KölbelandB. Weiss(eds.), Wittgenstein’s Lasting Significance ,London:Routledge. Crary,A.(2000a),“Wittgenstein’sPhilosophyinRelationtoPoliticalThought”,in:A.Craryand R.Read(eds.). Crary,A.(2000b),“Introduction”,in:A.CraryandR.Read(eds.). Crary,A.andR.Read(eds.)(2000), ,London:Routledge. Diamond, Cora (1991), The Realist Spirit. Wittgenstein, Philosophy, and the Mind , Cambridge: MassachusettsInstituteofTechnology. Diamond,Cora(2000),“Ethics,ImaginationandtheMethodofWittgenstein’sTractatus”,in:A. CraryandR.Read(eds.).

16 Fogelin,Robert(1976), Wittgenstein ,London:Routledge&KeganPaul. González Castán, Óscar (2001), “Lógica, Conocimiento y Valor: Un Tríptico Filosófico”, in: Revista de Filosofía ,25,187212. Glock,HansJohn(1996), A Wittgenstein’s Dictionary ,Oxford:Blackwell. Hacker,Peter(1986), Insight and Illusion ,Oxford:OxfordUniversityPress,revisededn. Hacker,Peter(2000),“WasHeTryingtoWhistleIt?”,in:A.Crary,A.andR.Read(eds.). Kober, Michael (1993), Gewissheit als Norm. Wittgensteins erkenntnistheoretische Untersuchungen in ÜberGewissheit,Berlin:deGruyter. McGuinness,Brian(1988), Wittgenstein, A Life ,London:Duckworth. McGuinness,Brian(1993),“Wittgensteinafter100years”,in: A Wittgenstein Symposium, Girona, 1989 ,Amsterdam:Rodopi. McGuinness, Brian (2002a), “The Unsayable”, in: B. McGuinness, Approaches to Wittgenstein: Collected Papers ,London:Routledge. McGuinness, Brian (2002b), “In the Shadow of Goethe: Wittgenstein’s Intellectual Project”, in: European Review ,10,4,447457. Pears,David(1986), The False Prison,Oxford:ClarendonPress. Sanfélix, Vicente (2008), “Sentir lo Indecible: Sentido, Sin SentidoyCarenciadeSentidoenel Tractatus deWittgenstein”,in: Revista de Filosofía ,33,2,520. Stroll,Avrum(1994), Moore and Wittgenstein on Certainty ,Oxford:OxfordUniversityPress. Stroud, Barry (1989), “Wittgenstein on the ImpossibilityofExplainingThoughtandLanguage”, manuscriptpresentedin A Wittgenstein Symposium , Girona, 1989.

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17 Wittgenstein,Ludwig(1985), Philosophical Investigations ,ed.G.E.M.AnscombeandR.Rhees, tr.G.E.M.Anscombe,2ndedn,Oxford:Blackwell.(AbbreviatedPI.)

Wittgenstein,Ludwig(1969), On Certainty ,ed. G.E.M.AnscombeandG.H.vonWright,tr.D. PaulandG.E.M.Anscombe,Oxford:Blackwell.(AbbreviatedC.)

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