"What I do want to insist is that the premise behind almost all the attacks – that there is no empirical evidence of IQ differences between broad racial categories – is not true. It is true (pdf), if you accept the broad racial categories Americans use as shorthand for a bewilderingly complex DNA salad (a big if, of course). There’s no serious debate about that. The serious debate is about what importance to assign to the concept of “IQ” and about the possible reasons for the enduring discrepancies: environment, nurture, culture, or genes – or some variation of them all"
"But please don’t say truly stupid things like race has no biological element to it or that there is no data on racial differences in IQ (even though those differences are mild compared with overwhelming similarity). Denying empirical reality is not a good thing in any circumstance. In a university context, it is an embrace of illiberalism at its most pernicious and seductive: because its motives are good."