[ekiru]

to claim he absolutely assisted, you actually just need to presume that he did something that helped. You can argue with those other points to try to argue about whether or to what extent it was a bad thing to do, but those arguments, even if valid, do not change the bare fact that he did in fact assist to some extent in Epstein's legal defense as a favour to his friend who was representing Epstein.

Though Pinker himself has said he regrets having provided that aid, so I don't think he himself fully agrees with you if you want to argue against it being something he should not have done.