jancivil wrote:the assertion was made that a person 'with a higher IQ' *will* go farther;
An abstract person, yes.
In fact we have numbers for all sorts of classes of "going" and can very accurately predict the results of a group. For example lets say of the group in a particular area of study belonging to a particular percentile, a specific portion will succeed. Of the group below this percentile a certain lower percentage will succeed. These numbers will remain very well defined.