“Which one is not possible?”
If you are unable to give a proper answer to the question “which one is not possible?”, in other words if you have a very hard or too sloppy super-ego, you will be totally unable to answer the question “which one is the most correct?” It means your ego-ideal has collapsed. A clear consequence of this are serious psychological disorders including psychosis, psychopathy and similar. We could make a sociological adaptation of this; in societies who in public life have to answer the question “which one is not possible?” and who have not quite internalized the effective legal system, this may lie at the bottom of the chaos experienced at the point of decision making.