Aresomepeoplebornclever,andothersbornstupidOrisintelligencedevelopedbyourenvironmentorexperienceStrangelyenough,theanswertobothquestionsisyes.
Ontheonehand,ifwetaketwopeopleatrandomfromthecrowd,itisverylikelythattheirdegreesofintelligencewillbecompletelydifferent.However,ifwetaketwoidenticaltwins,chancesarethattheywillbeasintelligentaseachother.Therefore,aconclusioncanbedrawnthatintelligenceistosomeextentsomethingwearebornwith.Thecloserthebloodrelationshipbetweentwopeople,theclosertheyarelikelytobeinintelligence.
Ontheotherhand,though,ifweputtwoidenticaltwinsindifferentenvironments,forexample,wemightsendonetouniversityandtheothertoafactorywheretheworkisboring,wewouldfinddifferencesintheirintelligenceseveralyearslater,whichindicatesthatenvironmentdoesplayacrucialroleinourintelligence.
Justaseverycoinhastwosides,ourintelligenceispartlybornandpartlydeveloped.Thesurewaytodevelopourintelligenceisintelligentparentsaswellasagoodenvironment.