 They then take up the two criticisms, one from both Booth and Couch, the other from Chirimuuta, which pull in opposite directions concerning their dependence on science. Booth and Couch both insisted that Polger and Shapiro rely too heavily on taxonomies postulated by scientists to characterize genuine instances of multiple realization. Polger and Shapiro take both Booth’s and Couch’s worry to be that their approach thereby shackles their account to “the whim of scientists” (2018: 449). They remind us that by “taxonomy” they refer to “whatever a particular science views as belonging within its domain” (2018: 449). The sciences themselves provide those; the best evidence we can have for any science’s “ontological commitments” are “the taxonomic representations and models that it uses” (2018: 450). Both Polger and Shapiro, and their multiple realization proponents, are assuming that the relevant sciences track real distinctions in the world. Polger and Shapiro agree that sciences can and do mischaracterize these, but “that problem has to do with the fallibility of evidence and not with our account of multiple realization” (2018: 450). Polger and Shapiro also admit that their reference to the notion of taxonomies has not always been clear; but nevertheless appealing to scientific taxonomies as a form of evidence for multiple realization is useful. Their focus on scientific taxonomies is thus not incompatible with more traditional philosophical discussions about multiple realization.