 The theories diverge in what additional conditions must be met for \(C=c\) to be a token cause of \(E=e\). Many, though not all, agree that counterfactual dependence between \(C=c\) and \(E=e\) is sufficient for \(C=c\) being a token cause of \(E=e\). (For more, see the entry on  counterfactual theories of causation.)