“…The ambiguity surrounding the 'stock' of labour or its services has not been resolved; therefore it must be the case that Walrasian neoclassical economics commands support on grounds other than perfect logical consistency, which grounds are better analysed in Kuhnian terms. 8 It can be argued, for example, that formalism in economics arose from a belief that nature is entirely mechanical and closed (see Maas, 1999, who made this argument with respect to Jevons). Yet if that type of belief is no longer current, then the methodology of formalism is not justified by ontology.…”