It could be 'Turtles all the way down". Recursion and bootstrapping is often used in engineering and the final theory of everything might well be a paradox of self-referential 'existence' model. That may be the cherry on top of this absurd world.

By the way, thanks for another great and deep article but I guess you may be tired of hearing it.

Oops ... wrote my comment before I finished the article. You covered this and more but self-referential angle might give an interesting 'twist'.