 What are the stimulus condition and manifestation of a given conventional disposition? It is generally held that any specification of the stimulus condition of a conventional disposition must include covert reference to a ceteris paribus clause (Prior 1985; Lewis 1997; Bird 1998; Mumford 1998; Mellor 2000; Malzkorn 2000; Cross 2005; Choi 2006, 2008; Hauska 2008b; Steinberg 2010): fragility, for example, is defined not as the canonical disposition to break when struck but rather as the canonical disposition to break when struck under certain standard conditions. For the sake of simplicity, let us combine this definition with SCA. Then it follows that ‘\(x\) is fragile’ is to be analyzed into ‘If \(x\) were struck under certain standard conditions it would break’ or ‘If \(x\) were struck then, ceteris paribus, it would break’. Recall that, in each of the alleged counterexamples to SCA, a fragile thing but not a non-fragile thing would break if struck in the absence of finks, reverse-cycle finks, maskers, mimickers, and so on. To the extent to which cases of finks, reverse-cycle finks, etc., are non-standard, therefore, the ceteris paribus clause ensures that ‘\(x\) is fragile’ has the same truth value as the associated counterfactual conditional in every case, thereby blocking the counterexamples.