  More recently Plantinga (2000) has defended a rather different account of divine inspiration, which he calls the Aquinas/Calvin model. This relies upon the doctrine of ‘original sin’ claiming that most humans suffer from a cognitive-affective disorder, but that as a result of Redemption the Holy Spirit heals us so that we are able to function properly, and come to believe the Christian revelation in an immediate, non-inferential manner. In this way the Aquinas/Calvin model supports the Christian metaphysics, which in turn supports the Aquinas/Calvin model. Presumably it will be granted that the probability, y, of the Aquinas/Calvin model given Christian metaphysics is significantly less than 100%, because there are rival Christian models. As a consequence, the probability, z, of Christian metaphysics is less than x/(1−y) where x is the probability of Christian metaphysics given the falsity of the Aquinas/Calvin model. Hence Plantinga’s proposal can succeed only if either y is near 100% or x is not too small.