 On this approach, one simply deletes the assignment \(B=0\), replaces it with \(B=1\), and solves for L using the equation \(L\dequal A\land B\). Since the deletion of \(B=0\) does not effect the assignment \(A=1\), it follows that \(L=1\) and that the counterfactual is true. This simple recipe yields the right result. Pearl nicely sums up the difference between this kind of analysis and a similarity analysis: