 Recall that the kinds of actualist-possibilist scenarios that we have been discussing—the cases of Professor Procrastinate and the case of Jones—are diachronic cases in the sense that they concern different acts that are performed across different moments of time, rather than at the same time. For example, in the case of Professor Procrastinate, one of the relevant counterfactuals is that if she were to ⟨agree to review the paper⟩ at \(t_1\), then she would ⟨not write the review⟩ at \(t_2\). The act in the antecedent and the act in the consequent are indexed to different times. On the surface, it may appear that a diachronic case would yield the same results as a synchronic case, i.e., a case that involves the performance of different acts at the same time. But as Goldman (1978) shows, a synchronic actualist-possibilist scenario yields new difficulties for actualism, including Goldman’s (1976)  (G*1),  and the way to address these difficulties is by incorporating a control condition over the truth-value of certain counterfactuals.