I've asked around a bit, and we can't recall when exactly EY claimed "world-class mathematical ability". As far as I can remember, he's been pretty up-front about wishing he were better at math. I seem to remember him looking for a math-savvy assistant at one point.
I too don't remember that he ever claimed to have remarkable math ability. He's said that he was "spoiled math prodigy" (or something like that), meaning that he showed precocious math ability while young, but he wasn't really challenged to develop it. Right now, his knowledge seems to be around the level of a third- or fourth-year math major, and he's never claimed otherwise. He surely has the capacity to go much further (as many people who reach that level do), but he hasn't even claimed that much, has he?
This leaves one wondering how the hell would one be this concerned about the AI risk but not study math properly? How the hell can one go on Bayesian this and Bayesian that but not study? How can one trust one's intuitions about how much computational power is needed for AGI, and not want to improve those intuitions?
I've speculated elsewhere that he would likely be unable to implement general Bayesian belief propagation graph or even know what is involved (its NP complete problem in general and the accuracy of solution is up to heuristics. Yes, heuristics...
I intended Leveling Up in Rationality to communicate this:
But some people seem to have read it and heard this instead:
This failure (on my part) fits into a larger pattern of the Singularity Institute seeming too arrogant and (perhaps) being too arrogant. As one friend recently told me:
So, I have a few questions: