I only mean with respect to the coordinates we use to talk about the world. It is tempting to believe you can give an objective description of the state of the

I only mean with respect to the coordinates we use to talk about the world. It is tempting to believe you can give an objective description of the state of the universe using a 4d vector space but this isn't true - the universe fundamentally has less structure than a vector space description suggests. And in GR it has structure which the vector space simply cannot capture.