 While many interesting cases involve identifying new inheritance channels which are based on new inheritance systems, and discussions are often ambiguous as to which of the two notions they refer to, the study of inheritance systems is a separate endeavor from the analysis of the inheritance channels affecting individual organisms or traits. The holistic view about inheritance, found in Developmental Systems Theory, rejects both the analysis of inheritance in terms of multiple systems and in terms of multiple channels, arguing that both distinctions are at most convenient idealizations (Griffiths &amp; Gray 2001), and it is not unusual for debates about holism to conflate the discussion of the two issues. DST proponents argue that some developmental resources are not easily represented as channels, especially persistent resources, that holism is more heuristically productive, and that channels are not statistically independent information carriers (Griffiths &amp; Gray 2001; see also the useful discussion by Griesemer et al. (2005: 526)).