 But we cannot simply read off the the relation of actual causation from the graph or from the equations. For example, the arrow from B to W in  Figure 4  cannot be interpreted as saying that Billy’s (in)action is an actual cause of the window breaking. Note that while it is common to distinguish between singular or token causation, and general or type-level causation (see, e.g., Eells 1991, Introduction), that is not what is at issue here. Our causal model does not represent any kind of causal generalization: it represents the actual and possible actions of Billy and Suzy at one particular place and time. Actual causation is not just causal structure of the single case. A further criterion for actual causation, defined in terms of the causal structure together with the actual values of the variables, is needed.