Knowingness seems somewhat mystical. Perhaps you could better define it, as I may be confusing it with faith.
Knowningness is the state of being that results from knowledge. For example, I know I exist and thus knowingness is allowed within me regarding that aspect of life for me. Knowingness is not in any way mystical - in fact, to me it is the opposite of mystical, since mysticism implies a degree of uncertainty to me.
In your example of the toe pain it is belief that facilitates the inaccurate perception, whereas knowingness leaves no space for inaccurate perception - we will simply know all facets of our experience in the correct way and in totality.