Rawls on procedures
If there is an independent standard to establish the correctness of the outcome of the procedure, procedures can be perfect or imperfect
Dividing a cake with the help of a good scale to weigh the pieces (and the crumbs) is a perfect procedure
Criminal procedures are imperfect: innocent people could go to jail, and criminals could go free
? Rawls, J. (1972). A Theory of Justice. Oxford University Press, Oxford.