[taylodl]

It provides simpler calculations in some cases. That's why physicists today elect to use the standard model, string theory, or brane theory depending upon whichever yields the easiest calculation for the problem they're trying to solve. One thing of note is that there's never been a calculation that hasn't agreed with observation. We simply have three different models that all work equally well. I think it's dishonest to not point that out.