I can't find the proper place for this so I'll put it here. I have some questions and some possible answers (or at least my answers). I apologize to the moderator that has to decide where to move this to.
Let me suggest that there should be a theory of TOEs.
What is a ToE? (For that matter, what's a theory and what's "everything"?)
Is there a TOE? How many? What's the simplest one? Is there a simplest one?
If there is a TOE, can it be represented symbolically vis a vis symbols human have created or can create? For example, is it expressible as a "one inch equation," a phrase made popular by Michio Kaku?
What traits must be common among all TOEs other than the defining traits? What are the characteristics that are essential to be a TOE?
This is all a study of TOEs without specifically mentioning any candidate TOEs, a theory of TOEs. Can a theory of TOEs produce or yield a TOE?
Can any of this be proved at least to the standards of modern math? If not, to what extent does that torpedo the whole notion of a TOE?