ABSTRACT:In Political Liberalism John Rawls argues that "the reasonable" and "the rational" are "two distinct and independent" ideas. This differentiation is essential to the viability of Rawls' conception of political liberalism insofar as it facilitates the recognition and subsequent voluntary acceptance of the need for a public conception of justice that requires all individuals to forsake the unfettered pursuit of their personal ambitions. However, the soundness of Rawls' argument is premised upon a number of questionable claims that, in effect, render his proposed distinction between the reasonable and the rational more chimerical than real, and in so doing critically undermine the ability of his conception of justice to secure the type of voluntary public consensus he deems necessary to establish and sustain a just and stable liberal democracy. It is concluded that the only way one can be assured of generating the sought after conditions is to develop a regulatory framework that publicly supports and protects the principles embodied in Rawls' conception of reasonableness, rather than relying upon the reasonableness of individuals to secure and nourish the required conditions.In Political Liberalism John Rawls (1993: 51) argues that "the reasonable" and "the rational" are "two distinct and independent" ideas. This differentiation is critical to the viability of his conception of political liberalism: It allows him to claim that individuals can effectively distinguish between what is "reasonable" and what is "rational," which, in turn, enables them to recognize the value and, indeed, necessity of adopting and supporting a public conception of justice 1 that requires all individuals to forsake the unfettered pursuit of their personal ambitions. Given the ineliminable diversity of reasonable moral, religious, and philosophical beliefs that characterizes contemporary liberal democracies-that is, the fact of reasonable pluralism-such recognition is essential if Rawlsian political liberalism is to provide for the establishment and preservation of the sociopolitical conditions necessary to secure and sustain a just and stable (in Rawlsian terms, well-ordered) liberal polity.However, the viability of Rawls' argument is premised upon a number of questionable claims that, in effect, render his proposed distinction between the reasonable and the rational more chimerical than real. In particular, when one penetrates the surface of Rawls' argument, it becomes clear that in a society governed by the principles of Rawlsian political liberalism a person's goals and related behavior can be considered genuinely rational only to the extent that they qualify as reasonable. If, as Rawls contends, a person's public behavior must be reasonable if it is to be legitimately accommodated, protected, and facilitated, then maximizing one's potential to achieve her *