The question he literally asked may well be stupid, but I think it's charitable to interpret it as asking what practical use we have for scientific racism that wouldn't violate some ethical injunctions.

It would be a long stretch.

In any case, I would have normally let it slide if not for a particular sentence in a {grand}parent post...

...we're talking about differences in average IQ between 95, 105, 110, 115. For one such as I, who's got an IQ of 168, this degree of difference seems unimpressive, and, frankly, worth ignoring/not worth knowing.