 Cameron admits that it is hard to argue for this intuition by appeal to a further, more basic metaphysical principle. Instead, he suggests, it can be supported by appeal to theoretical utility; a unified explanation of the same sort of phenomenon seems preferable to an infinite descending chains of separate explanations. In response to Cameron, Orilia (2009) has pointed out weaknesses in Cameron’s appeal to a unified explanation as a way of supporting the thesis of well-foundeness of all chains of ontological dependence (WF); thus, Orialia has concluded that WF cannot yet have a claim of being a contingent truth.