What Does It Take to Make a Difference? A Reply to Andreas and Günther

Andreas and Günther have recently proposed a difference-making definition of actual causation. In this paper I show that there exist conclusive counterexamples to their definition, by which I mean examples that are unacceptable to everyone, including Andreas and Günther. Concretely, I show that their definition allows c to cause e even when c is not a causal ancestor of e. I then proceed to identify their non-standard definition of causal models as the source of the problem, and argue that there is no viable strategy open to them to fixing it. I conclude that their definition of causation is damaged beyond repair.