Is physical space-time real? By real I of course mean mind independent. By space-time I mean the referent of the mathematical model that physicists use in relativity in which four dimensions always have to be specified.
I suppose that in effect I'm asking whether our relativistic sciences tell us what is really happening, and we always need to specify four dimensions to refer to these events.
Philosophers of science ask if structure entities and quarks are real, so why not space-time?
I would guess perhaps not, on the grounds that then I think everyday physical space and time too would then be real (as I quite naively assume that these reduce to the physicist's model, but realism about what reduces to what is physically real seems about right).