Veil of Ignorance

Broadly speaking, the purpose of the Veil of Ignorance (VI) is the determination of the just/unjust through means of a "thought experiment". It is a "device of representation" (pp. 85) which seeks to extricate "special psychologies" (e.g. envy, spite, aversion to risk or uncertainty) from the perspective of parties. Rawls explains, "however rational it might be for the parties to favor principles framed to promote the determinate and known interests of those they represent, should they have the opportunity, the constraints of right, joined with the limits on information make that impossible" (pp. 86) Further, Rawls also argues under the publicity condition, "that parties in the O.P. are to take into account the consequences, social and psychological, of public recognition by citizens that these principles are mutually acknowledged and that they effectively regulate the basic structure" (pp. 86) How is it impossible to operate on "special psychologies" if parties are to consider the consequences of the publicity condition (e.g. parties accounting for the public recognition of principles)? by what process does the publicity condition work, how does it account for public recognition? it seems that there are two versions of rationality developing, that of only an individual (unlimited rationality) versus that of a member of a party (limited by VI) or in the most complicated case, both. Is it Rawls position that the same individual may operate under both forms of rationality?