 Determinable-based MI is also usefully applied to the case of value indeterminacy on (some interpretations of) quantum mechanics. As Darby (2010) and Skow (2010) argue, ‘metaphysical supervaluationist’ accounts of MI (see Akiba 2004, Barnes 2010, Williams 2008, and Barnes and Williams 2011) cannot accommodate such MI. On these accounts MI is effectively understood as primitive unsettleness about which maximally precise world or state of affairs is the case; but as Darby and Skow observe, such an approach cannot model quantum MI, since the Kochen-Specker theorem rules out simultaneously assigning definite values to all properties of a quantum system.