Scott Alexander — Notable For: Author of Astral Codex Ten (formerly Slate Star Codex); influential rationalist blogger covering AI risk and effective altruism

NoteThe source confirms all key elements of the claim: (1) Scott Alexander is the author of Slate Star Codex (the former name of Astral Codex Ten); (2) he is described as an 'influential rationalist blogger'; (3) the source discusses his engagement with effective altruism and his concerns about AI (he mentions 'talking too much about the negatives of AI'). The source is from 2020 and uses the blog's former name 'Slate Star Codex' rather than the current 'Astral Codex Ten,' but this is a temporal/naming issue, not a contradiction. All substantive claims about his notable work and influence are confirmed.