 Second, why are there these particular contingent beings? The starting point here is the existence of particular things, and the question posed asks for an explanation for there being these particular things. If we are looking for a causal explanation and accept a full explanation (in terms of contemporary or immediately prior causal conditions and the relevant natural laws that together necessitate the effect), the answer emerges from an analysis of the relevant immediate causal conditions present in each case. Hume argues that an explanation in terms of temporally conjoined factors is all that is necessary for a satisfactory explanation. In contrast, O’Connor treats this formulation of the question as the basis for his construction of a cosmological argument for the existence of an absolutely necessary being (2008: 65). 