 For many critics,  premise 5  (along with  premise 2)  holds the key to the argument’s success or failure. The truth of 5 depends upon the requirements for an adequate explanation. Using the Principle of Sufficient Reason (PSR), what is required here is an account in terms of sufficient conditions that provides an adequate explanation why the cause had the effect it did, or alternatively, why this particular effect and not another arose. Swinburne (2004: 75–79), and Alexander Pruss (2006: 16–18) after him, note diverse kinds of explanations. In a full explanation the causal factors—in scientific causation, contemporary or immediately precedent causal conditions and natural laws; in personal causation, persons and their intentions— are sufficient for the occurrence of an event. They “together necessitate the occurrence of the effect” (Swinburne 2004: 76). 