 It is of course an important question as to whether the list is accurate or complete. To make progress on that question, however, there is, a prior question to answer: what are the criteria for inclusion in the list? (Whose beliefs are they supposed to be?) On the face of it, they are beliefs of those who have mastery of the concepts of color, i.e., including the many ordinary people who lack detailed scientific knowledge. This is certainly the view of Lewis and Jackson, who use the term “folk concept” in referring to the ordinary concept and who, in addition, see the possession of the concept as involving having a theory, e.g., a folk theory of color: a set of beliefs or platitudes about color. 