[neutralino]

Originally Posted by RascalPuff Granted there are many similarities, but what - if any - specific differences distinguish a Grand Unified Field Theory (G.U.T.) from a Theory of Everything (T.O.E.)? Is there a specific definition that accomodates these similarities and differences? Are there a series of distinctions that explain the differences and similiarities? The question is asked for many reasons, most particularly because it seems fairly certain that the two objectives parallel - and may learn from one another - in many ways.

If you want an actual scientific answer, then a grand unified theory is a theory in which three of the the fundamental forces are unified (strong, weak, electromagnetic) whereas a "theory of everything" would be a theory that unifies all four fundamental forces (i.e. gravity with the above three).