Nobody knows this since there is no exact mathematical formulation of "the theory" to begin with.
> that fits existing data
Nobody knows this either since nobody has derived either General Relativity or the Standard Model of particle physics as an approximation to any string theory model.
Nobody knows this since there is no exact mathematical formulation of "the theory" to begin with.
> that fits existing data
Nobody knows this either since nobody has derived either General Relativity or the Standard Model of particle physics as an approximation to any string theory model.