I don't know anyone who could not become a purple belt in Brazilian jujistu in 5 years , gain an intuitive  understanding of it  and solve the complex problems neccessary to demonstrate competence in this practice, a practice which is heavily deependant on cognitive problem solving. <br><br>When the average person leaves school at 18, after 15 years of education, they still can't reason intuitively in mathematics, one can only assume that  either math is so difficult that learning it to a decent level is beyond most human comprehension or our educational system is so flawed that 15 years of education produces very little effect on specific domain competencies.<br><br>If we had systems of mathematical Learning that looked more like play drilling, experiments and collaborative problem solving, which are  sort of process that happens in Brazilian jujistu schools  I'm Prerty sure overall G would go up, <br><br>such was the case when black men got together and made some of the most complex music the world had seen in the form of bebop jazz