Normal deterrence policy:
1. Do this (usually attacking us with nukes) and we'll do that (attack you with nukes.)
2. Give somebody else the weapon or the technology or know-how that enables them to attack us with nukes, and if they then attack us with nukes, we'll attack YOU with nukes, even if the actual attack came from them. (and of course we'll nuke them too, but that's not much of a deterrent to you, is it?)
Krauthammer deterrence policy
1. Whether or not we can prove that you are behind the attack, if anyone nukes us, we will assume that they got know-how or technology or weapons or materials from you that enabled that attack, and so you better pray that nobody attacks us because we'll nuke you. We'll nuke you on suspicion alone.