By generativity do you mean “within-domain” generativity?
Not exactly, because Carmack has worked in more than one domain (albeit not as successfully; Armadillo Aerospace never made orbit.)
On those dimensions, it seems entirely fair to compare across topics and assert that Pearl was solving more significant and more difficult problem(s) than Carmack
Not exactly, because Carmack has worked in more than one domain (albeit not as successfully; Armadillo Aerospace never made orbit.)
Agree on significance, disagree on difficulty.
In an interesting turn of events, John Carmack announced today that he’ll be pivoting to work on AGI.