 Explanation will frequently involve the invocation of counterfactuals, often of the form: if event B had not occurred, neither would event A have (van Fraassen 1980, 118). That’s because (as just noted) explanations are frequently causal in character, and analyses of causation typically invoke some sort of counterfactual. Another component of the constructive empiricist’s efforts at showing explanation to be context-dependent, then, amounts to his exposition of the context dependence of counterfactuals.