 Quine’s argument initiated a debate that is still alive. Various nominalist responses questioned one or another of the premises in his argument. For instance, Field (1980) challenged the idea that mathematics is indispensable for our best scientific theories—i.e., rejecting (i) above—and thus faced the task of rewriting classical and modern physics in nominalistic terms in order to sustain the challenge. Others have taken on the somewhat less daunting task of accepting (i) but rejecting (ii) and (iii); they’ve argued that even if our best scientific theories, in regimented form, quantify over mathematical entities, this doesn’t entail a commitment to mathematical entities (see Azzouni 1997a, 1997b, 2004; Balaguer 1996, 1998; Maddy 1995, 1997; Melia 2000, 2002; Yablo 1998, 2002, 2005, 2009; Leng 2010.) Colyvan (2010) coined the expression ‘easy-roaders’ for this second group, since they avoided the ‘hard road’ of paraphrasing our best scientific theories in non-mathematical terms.