 Clause (i) ensures that the subject has some measure of positive justification for h—if she had no justification for it, it would be more reasonable for her to withhold with respect to h. Clause (ii) then says that those beliefs of the subject are certain which are at the highest levels of justification for her. However, this still leaves open the following possibility: h is the most highly justified belief the subject has, but it is still not very highly justified (e.g., it may not even be sufficiently justified to count as knowledge).