Intelligence is better understood as a product of environment and genetics.  The best brained person with no prior social contact fails to learn any language and will have a zero IQ.  A person with an average brain can be taught to perform the tasks that typically occur on an particular IQ test and improve the score on that IQ test.  Also, do not use school education as an effective environmental factor because the educational system is poorly effective environment for learning; I know as I raised 3 children.  Maybe IQ is a measure of how well you can compensate for a poor learning environment.,(reply>), There are many maybe's and just as many probably nots.