What I am trying to say is that I feel the human brain is extremely specialized. Not just something like multiple intelligences but literally case by case, problem by problem.
Making this claim requires some explanation for the correlations we see (some people seem to be able to solve more problems on average than others). I am saying that some of these correlations are probably genetic (person x has more neurons or faster or more connections or whatever) but a lot of it probably has to do with motivation.
Also all of those theories of intelligence are basically BS. For a great (if longwinded and somewhat difficult to read) explanation, see
http://vserver1.cscs.lsa.umich.edu/~...eblog/523.html. The basic idea is that just because you run PCA on your data and get some dominant eigenvalues doesn't mean that your new basis vectors actually have physical meaning. Sometimes they do, sometimes they dont.