关于人脑与电脑区别的英语作文
Thedifferencebetweenabrainandacomputercanbeexpressedinasingleword:complexity.
Eventhemostcomplicatedcomputermanhasyetbuiltcan'tcompareinintricacywiththebrain.Computerswitchesandcomportentsnumberinthethousandsratherthaninthebillions.What'smore,thecomputerswitchisjustanon-offdevice,whereasthebraincellisitselfpossessedofatremendouslycomplexinnerstructure.
Canacomputerthink?Thatdependsonwhatyoumeanby"think".Ifsolvingamathematicalproblemis"thinking",thenacomputercan"think"anddosomuchfasterthanaman.Ofcourse,mostmathematicalproblemscanbesolvedquitemechanicallybyrepeatingcertainstraightforwardprocessesoverandoveragain.Eventhesimplecomputersoftodaycanbegearedforthat.
Surely,though,ifacomputercanbemadecomplexenough,itcanbeascreativeasweare.Ifitcouldbemadeascomplexasahumanbrain,itcouldbetheequivalentofahumanbrainanddowhateverahumanbraincando.
Buthowlongwillittaketobuildacomputercomplexenoughtoduplicatethehumanbrain?Perhapsnotaslongassomethink.Longbeforeweapproachacomputerascomplexasourbrain,wewillperhapsbuildacomputerthatisatleastcomplexenoughtodesignanothercomputermorecomplexthanitself.Thismorecomplexcomputercoulddesignonestillmorecomplexandsoonandsoonandsoon.
Inotherwords,oncewepassacertaincriticalpoint,thecomputerstakeoverandthereisa"complexityexplosion".Inaveryshorttimethereafter,computersmayexistthatnotonlyduplicatethehumanbrain--butfarsurpassit.