智课网GRE备考资料---本文于网络，仅供参考，勿照抄，如有侵权请联系删除---新东方GREargument范文10篇（八）Aspeoplegrowolder,ĠanenzymeknownasPEPincreasinglybreaksdowntheneuropeptidechemicalsinvolvedinlearningandmemory.Butnow,researchershavefoundcompoundsthatpreventPEPfrombreakingneuropeptidesapart.Intests,thesecompoundsalmostcompletelyrestoredlostmemoryinrats.Theuseofthesecompoundsshouldbeextendedtostudentswhohavepoormemoryanddifficultyinconcentrating-andthereforeseriousproblemsinschoolperformance.Sciencefinallyhasasolutionforproblemsneitherparentsnorteacherscouldsolve.Inthisargument,thearguerstatesthatresearchershavefoundcompoundsthatkeepanenzymeknownasPEPfrombreakingneuropeptidesapart,whichareknowntobeinvolvedinlearningandmemory.Thearguerstatesthattestshaveshownthatthesecompoundsalmostcompletelyrestoredlostmemoryinrats,andthattherefore,thesecompoundsshouldbeadministeredtostudentswithpoormemoryanddifficultyinconcentrating.Thisargumentisunconvincingbecauseitcontainsseveralcriticalflawsinlogic.Firstofall,thearguerstatesthataspeoplegrowolder,PEPbreaksdowntheneuropeptidechemicalsthatareinvolvedinlearningandmemory.Itistruethatgenerally,aspeoplegetolder,theytendtohavemoreproblemswithlearningandmemory.However,thereisnodirectlinkmentionedbetweenthebreakingdownoftheneuropeptidechemicalsandthelossoflearningabilityormemory.Additionally,thearguermentionsneuropeptidechemicalsthatarebrokendownbyPEP.Whattheresearchershavefoundisacompoundthatpreventsneuropeptidesfrombreakingapart.Thesearetwodifferentphysicalactions:thebreakingdownofneuropeptidechemicalsasopposedtothebreakingapartoftheneuropeptidesthemselves.Furthermore,itisnotstatedwhichofthesephysicalactionsisinvolvedwiththelossoflearningabilityandmemory.Itisnotexplicitlystatedthatthebreakingdownofchemicalscausesalossinlearningabilityandmemory,onlythatthishappensaspeoplegrowolder.Itisalsonotexpresslystatedwhetherthebreakingapartoftheneuropeptidesthemselvescausesmemorylossoralessenedlearningability.Withoutshowingadirectlinkbetweentheeffectofkeepingtheneuropeptidesfrombreakingapartandareductioninthelossofmemoryandlearningability,theefficacyofthecompoundsiscalledintoquestion.Secondlyandmostobviously,thecompoundswereonlytestedonrats.Ratsmayhaveasimilargeneticstructuretohumans,buttheyaremostcertainlynotthesameashumans.Theremaybedifferentcausesforthelearningandmemoryproblemsinratsasopposedtothatofhumans.Theeffectofthecompoundsonratsmayalsobeverydifferentfromtheireffectonhumanbeings.Itisabsurdintheextremetoadvocategivingthesecompoundstostudents,evenassumingthattheywouldhelpthestudentswiththeirstudies,withoutconductingfurtherstudiesassessingthecompounds'overalleffectsonhumans.Theargumentfailsonthisparticularfactiffornootherreason.---本文于网络，仅供参考，勿照抄，如有侵权请联系删除---Additionally,thearguerbeginshisorherargumentbystatingthat"aspeoplegrowolder",PEPbreaksdowntheneuropeptidechemicalsinvolvedinlearningandmemory.Attheendoftheargument,theargueradvocatesextendingthecompoundsthatpreventPEPfrombreakingneuropeptidesaparttostudentswhohavepoormemoryanddifficultyinconcentrating.Studentsaregenerallyyoung,notolderpeople.Thereisnoevidencepresentedthatshowswhatactuallycausesstudentstohaveapoormemoryordifficultyinconcentrating.Indeed,itismorelikelythatitisextracurricularactivitiesoralackofsleepthatcausessuchprobl...