 This claim, of course, has not gone without comment. For a selection of some discussion see, in particular, D’Arms (1996, 2000); D’Arms et al., 1998; Danielson (1998); Bicchieri (1999); Kitcher (1999); Gintis (2000); Harms (2000); Krebs (2000); Alexander and Skyrms (1999); and Alexander (2000, 2007).