Because it is impossible for an agent to have power over what is past, the second conjunct of this state of affairs is not possibly brought about by anyone.

Lastly, although (f) is unrestrictedly repeatable, (f) is another type of complex state of affairs. In particular, it is identifiable with or analyzable as a conjunctive state of affairs. This state of affairs has three conjuncts, the second of which is not possibly brought about by anyone. The conjunctive state of affairs in question can be informally expressed as follows: Plato decides to write a dialogue; and there is no antecedent sufficient causal condition of Plato’s deciding to write a dialogue; and there is no concurrent sufficient causal condition of Plato’s deciding to write a dialog...