Problem is if your system is actually capable measuring up to the claimed degree of accuracy, or just stabbing in the dark after a certain point. IQ tests supp

Problem is if your system is actually capable measuring up to the claimed degree of accuracy, or just stabbing in the dark after a certain point. IQ tests supposedly become inaccurate after 150/160, so you wouldn't really want to put too much emphasis on 180 vs 170 at those levels.