An obvious advantage with the specifier’s approach is that it maintains the simple relationship between dispositions and conditionals. But it has its problems. One worry is whether our dispositional concept of conventional disposition D is detailed enough to exclude all would-be maskers. Directing the point more specifically at Choi, the worry is whether the notion of “the ordinary conditions for D,” possessed by the bearers of that dispositional concept, suffices to rule out all would-be, non-standard maskers. If it fails to do this, then it would be possible to formulate a case in which those who possess the dispositional concept D are convinced that the object can truly be ascribed D, yet when it undergoes the D-stimulus under what they take to be ordinary conditions, it fails to manifest the D-manifestation. If the dispositional concept in question does not alert them to the fact that there is a masker present, rendering the circumstances unordinary, then the conditional analysis fails.
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