 As is already clear, analyses of dispositions usually proceed on the assumption that, for any disposition, we can identify its stimulus conditions and manifestations. It is typically said that dispositions would exhibit their ‘characteristic manifestations’ under some ‘stimulus conditions’. However, most conventional dispositional predicates—‘fragile’, ‘soluble’, ‘malleable’ and the like—make no explicit reference to the stimulus conditions and manifestations for the properties they express and the assumption that we are nonetheless in a position to identify those stimulus conditions and manifestations is controversial. The stimulus condition and manifestation of (water-)solubility are typically assumed to be the event of being put into water and the event of dissolving, respectively, and perhaps uncontroversially so. But what are the manifestations of fragility? Something like shattering or cracking, it seems. But what about splintering, or breaking cleanly in two, or, as with a fragile house of cards, collapsing? It seems hard to say. And what exactly are the stimulus conditions of fragility? Striking, it seems. But what about twisting or shaking? We are at a loss. But do these questions have to do with philosophical understanding of dispositions at all?