 Draper then focused upon three sets of propositions about occurrences of pleasure and pain, dealing, respectively, with (a) the experience of pleasure and pain, by moral agents, which is known to be biologically useful, (b) the experience of pleasure and pain, by sentient beings that are not moral agents, which is known to be biologically useful, and (c) the experience of pleasure and pain, by sentient beings, which is not known to be biologically useful, and Draper then argued that, where ‘O’ expresses the conjunction of all those propositions, and ‘T’ expresses the proposition that God exists, the probability that O is the case given HI is greater than the probability of O given T. It then follows, provided that the initial probability of T is no greater than that of HI, that T is more likely to be false than to be true.