[matttb]

Do you have a link to this? I haven't been able to find it

[Turing_Machine]

Most recently at https://astralcodexten.substack.com/p/nootropics-survey-2020...

Note that he's switched to a different URL for his blog; that may be why you couldn't find it -- although I'm pretty sure he mentioned it on the old site several times as well.