 If the problem illustrated by Gettier cases is that JTB and JTB+ analyses are compatible with a degree of epistemic luck that is inconsistent with knowledge, a natural idea is to amend one’s analysis of knowledge by including an explicit “anti-luck” condition. Zagzebski herself outlines this option in her 1994 (p. 72). Unger 1968 gives an early analysis of this kind. For example: