[SBF's] psychiatrist, George Lerner, worked in the same office as Scott Alexander IIRC (I’ve lost track of the source, will post later if I can find it).
It was in an ACX blog post, siskind just admitted it out of nowhere. edit: Well ok because he was obviously discussing him, but the possibility of any connections between them wasn't really on anyone's radar by then I think.
edit: Got it: https://www.astralcodexten.com/p/the-psychopharmacology-of-the-ftx#footnote-anchor-1-84889532