 Under Non-Centralism it might be difficult to explain why thin evaluative reflection should tend to lead to a loss of traditional thick concepts. Thick Centralism rules out Separability (see  section 3),  but note in addition that Williams needs a version of Thick Centralism on which the claim that grasping thin concepts requires grasping specific thick concepts is compatible with the possibility of subsequently losing those thick concepts through reflection that deploys thin concepts. Regarding thick concepts in this way as a throwaway ladder might not yield a stable form of Thick Centralism. An important potential implication of Thick Centralism is that since not everyone shares the same thick concepts, there might be no evaluative language that is “conceptually homogeneous” across cultures or across disagreements within a culture (cf. Williams 1995). Williams further argues that we can draw significant conclusions about the nature of not just ethical knowledge but also of evaluative truths and their objectivity specifically from reflection on thick terms and concepts, but these arguments are highly controversial (see Williams 1985: 135–6, 146–55; Quinn 1987; Scheffler 1987; Williams 1995; Lang 2001; Moore 2003; Kirchin 2017: ch. 172–80).