>the alternate universe where DFW became a mathematician or a logician and never wrote fiction
DFW studied in the humanities, why are you bringing up math? Is it the figuratively autistic writing style?
If it's because of his essay or the passages about statistics in his novels, anyone who has more than passing knowledge of these fields knows that he just dabbled and gave no signs of having any particular talent for them.
>the alternate universe where Grothendiek became a prose writer