 In general, then, the symmetric analysis of similarity and the de facto asymmetry of overdetermination together imply that worlds that accommodate counterfactual changes by preserving the actual past and allowing for divergence miracles are more similar to the actual world than worlds that accommodate such changes by allowing for convergence miracles that preserve the actual future. This fact in turn implies that, where the asymmetry of overdetermination obtains, the present counterfactually depends on the past, but not on the future.