Full Idea
The sort of dependency expressed by counterfactual relations is considerably broader than strictly causal dependency, and causal dependency is only one among the heterogeneous group of dependency relationships counterfactuals can express.
Gist of Idea
Causation is not the only dependency relation expressed by counterfactuals
Source
Jaegwon Kim (Causes and Counterfactuals [1973], p.205)
Book Reference
'Causation', ed/tr. Sosa,E. /Tooley,M. [OUP 1993], p.205
A Reaction
In 'If pigs could fly, one and one still wouldn't make three' there isn't even a dependency. Kim has opened up lines of criticism which make the counterfactual analysis of causation look very implausible to me.