What Is a Theory of Everything?

i want to talk about what it means to have a theory of everythingwe've never seen one. I believe that this theory is an incredibly joyous one. We don't think enough about what the difference is between, in physics, an effective theory and a fundamental one. This is the problem that bedoubles us when we search for a unified theory that doesn't be double us,. In my opinion, in any previous effective theory.