They are perhaps also relative to structures of Unknowing towering architectures of ignorance, systems of disbelief.
For any identity there is a hierarchy of Not Knowing. For example, a "bleeding heart liberal" has a structure of unknowing including the reality of consciousness' invulnerability, and also unknowing of the so called "evil" in some men's minds. His opposition, say a red necked militarist, has a structure of unknowing the nature of human suffering, the cultural depravity induced by militaristic myths, and the roots of his own destructive psychoses.
The poetess struggling to make ends meet on her inheritance has a structure of not knowing about making things happen, about investing at better than 11 per cent, about managing her finances and about the futility of words. The ravenous L BO financier cum young Turk knows not that the heart hears songs long before the mind counts profits.
Any belief system, then, has its Unknow system. Discovering what should be unknown about reality uncovers the cores of resistance. "I have no idea about ______". "X is incomprehensible". This uncovers a working approach in listing "subjects you would like to know more about"; when one finds a subject and releases his resistance against the found item he blows off a key resistance to knowing.