  Modal interpretations accept both (b) and (c), so that it follows that they must violate (a). Thus, it seems clear that modal interpretations have to view quantum mechanics as “incomplete”. Indeed, it is true that according to modal interpretations the quantum state does not fix all actual physical properties (i.e., the actual values of all definite-valued physical quantities) of a system, which is the criterion of incompleteness presupposed in (a).