 Beckers and Vennekens (2018) begin with explaining what it is for the value of a variable to determine the value of another variable—according to a structural equation—in a context \(L\). This explanation gives us the notion of \(C\) being a direct possible contributing cause of \(E\). Such a direct possible contributing cause is actual if \(C\), \(E\), and the context \(L\) are actual. For \(C\) to be an actual contributing cause of \(E\), there must be a sequence