 A third distinction that must be drawn is between the justice of the procedures that might be used to determine how benefits and burdens of various kinds are allocated to people, and the justice of the final allocation itself. It might initially seem as though the justice of a procedure can be reduced to the justice of the results produced by applying it, but this is not so. For one thing, there are cases in which the idea of an independently just outcome makes no sense. A coin toss is a fair way of deciding who starts a game, but neither the Blues nor the Reds have a claim of justice to bat first or kick off. But even where a procedure has been shaped by a concern that it should produce substantively just outcomes, it may still have special properties that make it intrinsically just. In that case, using a different procedure to produce the same result might be objectionable. In an influential discussion, John Rawls contrasted perfect procedural justice, where a procedure is such that if it is followed a just outcome is guaranteed (requiring the person who cuts a cake to take the last slice himself is the illustration Rawls provides), imperfect procedural justice, where the procedure is such that following it is likely, but not certain, to produce the just result, and pure procedural justice, such as the coin-tossing example, where there is no independent way to assess the outcome – if we call it just, it is only on the grounds that it has come about by following the relevant procedure (Rawls 1971, 1999, § 14).