The restrictions on particular info

The restrictions on particular information in the original position are, then, of fundamental importance.
Whithout them we would not be able to work out any definite theory of justice at all. We would have to be content with a vague formula stating that justice is what would be agreed to without being able to say much, if anything, about the substance of the agreement itself.
The formal constraints of the concept of right, those applying to principles directly, are not sufficient for our purpose.
The veil of ignorance makes possible a unanimous choice of a particular conception of justice.
Without these limitations on knowledge the bargaining problem of the original position would be hopelessly complicated.
Even if theoretically a solution were to exist, we would not, at present anyway, be able to determine it.