 Another contrast with Devlin’s members of the jury, is that Rawlsian public reason is not simply a matter of getting a sample of the people into a notional room and waiting for them to agree, however that is to be done. Public reason is itself a substantive framework to be shared by everyone, a module, “a complete political conception” whose principles and ideals are to be elaborated and whose arguments are to be deployed in legal argument (Rawls 1999: 138). It has content, in other words, “given by a family of reasonable conceptions of justice” (Rawls 1999: 132). While, as we have just noted, a natural law or Roman Catholic world view cannot itself be adopted under public reason, its conception of the common good or solidarity when “expressed in terms of political values” can be one grounding for a political conception that gives content to public reason (Rawls 1999: 142). For interesting explorations of the relationship between religious comprehensive doctrines and public reason, see, e.g., An-Na’im 2015, Billingham 2021.