Rawlsian “reasonableness” has been the object of considerable and varied criticism. Reactions range from its being “loaded” (Stout 2004: 184) or “chimerical” (Young 2005: 308) to “entirely circular” (Mulhall and Swift 2003: 483). Yet more critical reactions often employ external standards or equivocal senses of reasonableness to their detriment (Freeman 2004: 2045, 2063-5) or marshal apparently conflicting materials from Rawls’s broader theory (Young 2005, 2006). In this paper, I put forward a narrow, immanent criticism whereon the two basic aspects of reasonableness are shown to be in tension: the “burdens of judgment” may give the person reason to disagree over the need to propose and to abide by a common basis of fair terms of cooperatio...