From the New York Times:
The resignation came after silence from Downing Street about an adviser who once said blacks have lower IQs than whites.
By Stephen Castle, Feb. 17, 2020
But, as Andrew Sabisky noted at around age 20 or 21 in a comment on a blog, blacks do have lower IQs than whites on average. That’s likely the single best-confirmed fact in the history of the social sciences.
The Guardian frames it the exact same way: Out of the various controversial comments Sabisky put on the Internet in his 20s, the single most heinous is the one that is factually unquestionable:
Move comes after hiring of new adviser who said black people have lower average IQs
Rowena Mason Deputy political editor
Mon 17 Feb 2020
Boris Johnson’s spokesman has refused to say whether the prime minister thinks black people have lower IQs on average, or agrees with eugenics, after No 10 hired an adviser with highly controversial views.