First, it is difficult to measure the intelligence of people with education, language or culture different from those for which the exam was prepared. Second, the school of thought that race had a link to intelligence collapses when put under scrutiny and contextualized. Third, the environment in which we live has undergone radical changes and with it our intellect has also changed over time, and the twin dilemma, although a very interesting research, needs more context and a wider variety of samples before a conclusion can be drawn. All in all it seems that the theory of how someone is raised affects the intellect more than the circumstances