Justice, truth and Nozick
That a conclusion could have been deduced by truth-preserving means from premisses that are true suffices to show its truth. That from a just situation a situation could have arisen via justice-preserving means does not suffice to show its justice. The fact that a thief's victims voluntarily could have presented him with gifts does not entitle the thief to his ill-gotten gains (Anarchy, State and Utopia, Blackwell 1974, pp. 15 -2).