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A little further down the page [...] . In these variables, velocities greater than c . are certainly possible [...] ... at least given how the values of GR velocity v and GR distance D appear in the Hubble law , and if there are indeed values D_exc( t ) in the range of the GR distance definition such that H D_exc( t ) = d/dt( D_exc( t ) ) c for suitable values H; while OTOH for pairwise distances x( t ) measured through the procedures of special relativity holds d/dt( x( t ) ) < c, of course. Ned Wright states some further properties of the GR distance D which imply more directly, without involving the Hubble law , that values of D cannot in general be defined and measured through the SR procedures (as values x ). After all, I'm not primarily concerned with the applicability of any particular Hubble law , but instead with which, if any, reproducible measurement procedures of GR are being used to define the quantities (e.g. values of coordinate relations) in terms of which any laws can be stated in the first place. . The distance in the Hubble law must be defined so that . if A and B are two distant galaxies seen by us . in the same direction, . and A and B are not too far from each other, . then the difference in distances from us, [... . D_{ Us_now }_( B, Us ) - D_{ Us_now }_( A, Us ), . notation consolidated - FW] . is the distance A would measure to B. . But this measurement must be made now