But we know that he was unusual: He has a very high IQ. This by itself raises the probability of being a math crank (it also raises the probability of being a mathematician of course).
It’s similar to how our LW!Harry Potter has increased chances of being both hero and Dark Lord.
It seems to me that unless Eliezer was unusual in some other important way not described, he was not at close risk of becoming a math crank.
But we know that he was unusual: He has a very high IQ. This by itself raises the probability of being a math crank (it also raises the probability of being a mathematician of course).
It’s similar to how our LW!Harry Potter has increased chances of being both hero and Dark Lord.