 Finally, something needs to be said about  premise 3  and  conclusion 5,  which asserts that the cause of the universe is personal. Defenders of the cosmological argument suggest two possible kinds of  explanation.[3] Natural explanation is provided in terms of precedent events, causal laws, or necessary conditions that invoke natural existents. Personal explanation is given “in terms of the intentional action of a rational agent” (Swinburne 2004: 21; also Gale and Pruss 1999). We have seen that one cannot provide a natural causal explanation for the initial event, for there are no precedent natural events or natural existents to which the laws of physics apply. The line of scientific explanation runs out at the initial singularity, and perhaps even before we arrive at the initial singularity (at \(10^{-35}\) seconds). If no scientific explanation (in terms of physical laws) can provide a causal account of the origin of the universe (premise 4), the explanation must be personal, that is, in terms of the intentional action of an intelligent, supernatural agent.