Knowing is a doing. A search for knowledge. An action. Not-knowing is non-action. Not-knowing is just being. Non-oriented non-seeking. A break from the existential hustle of info-processing. That too is mindfulness - the mindfulness of not-paying-attention. The mindfulness of mindlessness. Not of the mindlessness of automaticity, but the mindfulness of an empty mind, of a mind that is not preoccupied with information-processing. The nirvanic mindfulness of an empty cup.