Yes, I believe that's essentially his thesis, at least with respect to aptitude, based on my discussion with him in a sister thread. He's apparently referring

Yes, I believe that's essentially his thesis, at least with respect to aptitude, based on my discussion with him in a sister thread. He's apparently referring to the MCAT and LSAT, which serve as entrance examinations for medical and law schools respectively. Similarly the SAT, which is the undergraduate entrance examination used by many schools, is a very good predictor for score on an actual IQ test. So much so that one can conflate the two without really being very wrong.