"A lot of the Olympic games just boil down to genetics. Michael Phelps is genetically built to swim better than other people if he trains the same way. You might as well have a competition for who's the tallest, and act like it's anyone's game!"

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Intelligence is important in psychology for two reasons. First, it is one of the most scientifically developed corners of the subject, giving the student as complete a view as is possible anywhere of the way scientific method can be applied to psychological problems. Secondly, it is of immense practical importance, educationally, socially, and in regard to physiology and genetics.

— Raymond Cattell