 Reydon (2016) has argued for a model which attempts to reconcile and integrate the metaphysics and the epistemology in the act of classification. On his co-creation model of natural kinds, both nature and the classifier are constitutive of the creation of kinds’ (p. 70); kinds are ‘co-determined by aspects of the state of affairs in nature as well as by background assumptions and decisions by investigators’ (p. 59).