However, the construction of this paradox of deontology rests firmly upon ideas that Nozick has rejected on his way to asserting deontic side constraints.a supposed paradox that the wrongfulness of killing must rest on the badness of the results of such killings; but recourse to the badness of results in the assessment of actions leads to the endorsement of killings in precisely those cases in which the advocate of deontic constraints wants to insist upon their wrongfulness.