EY = Eliezer Yudkowsky
Thank you, like most of the world I would assume "EY" would refer to Ernst and Young, the multi-national Big Four with a website of ey.com who I'm sure has opinions on AI, but nowhere near enough to be classed as expertise
That book was written by him, so I figured the acronym was obvious. My bad!
Appreciate that you made account just for this. I was well aware of Yudkowsky but even so couldn't parse this "EY" initialism