Well yes, but our understanding of what approximations should work is not really separable from the theory itself. E.g. from the article, > Van Kolck contends

Well yes, but our understanding of what approximations should work is not really separable from the theory itself. E.g. from the article, > Van Kolck contends that some of the parts deemed less important and routinely ignored are in fact very important. So it's still good science IMO.