Unconscious Incompetence: the missing item
Like knowledge, capacities are either conscious or not.
When a knowledge, a skill, a capacity is conscious, you know to reach for it when it would be useful. It is like you know you have a Phillips screwdriver… and you reach for it.
But if you have never had a Phillips screwdriver, as far as you are concerned, you have to substitute other methods to screw in a screw, imperfect tools for an imperfect result, or give it up and find another screw. Makes sense so far?