 Lewis  (1986b)  briefly suggests a quite different analysis of qualitative indiscernibility: \(x\) is qualitatively indiscernible from \(y\) just in case \(x\) and \(y\) share the same “somewhat natural”  properties.[25]  If we take the “somewhat natural” properties to be those with finite definitions in terms of perfectly natural properties, sharing of these properties will follow from indiscernibility as defined by  Indiscernibility;  however the converse implication can fail when there are infinitely many objects.