Disclaimer- I only went from his responses to critics, in which some points weren't clear.

1: I just assumed (perhaps wrongly) that even Sam Harris would see the validity of an is-ought divide to some extent. If he hasn't, then I can refer to Hume and copy-paste his arguments for the win.

2: O.K then.

3: Refer to my disclaimer.

4: Which makes it even harder for him to go from an is to an ought, as he can't use the idea that he's merely following human intuitions somehow. He's following his own, very alien intuitions instead and can't justify them.