【導讀】sgravity.Insidewasanexhibitionofthemostup-to-dateinventionsofthe31stcentury.Aguide(G)showedusaroundalongamoveablepath.G:Goodmorningtoalourvisitorsfrom20xx.Firstwe?regoingtoexamineoneofthelatestformsofmunicationamongourspacecitizens.Nomoretypistsworkingonatypewriterorputer!Nomorepostageorpostcodes!Messagescannowbesentusinga“thoughtpad”.Youplacethemetalbandoveryourhead,clearyourmind,pressthesendingbutton,thinkyourmessageandthenextinstantit?ssent.It?sstoredonthe“thoughtpad”ofthereceiver.It?squick,eficientandenvironmentallyfriendly.Theonlylimitationisiftheuserdoesnotthinkhisorhermessageclearly,anunclearmessagemaybesent.Butwecannotblamethetoolsforthefaultsoftheuser,canwe?DuringtheexplanationIlookedatthepairofsmalobjectscalled“thoughjtpads”onatable.Theyjustlookedlikemetalribbons.Soordinarybutsopowerful!WhileIwasobservingthem,thepathmoveduson.G:Andnowladiesandgentlemen,weareinthe“environmentarea”.Peopleusedtocollectwasteindustbins.Thentherubishwassenttobeburiedorburned,amIright?(Wenodded.)Well,nowthere?