Alvin Plantinga

Take naturalism to be the idea that there is no such person as God or anything like God. Many philosophers hold that naturalism can accommodate serious moral realism. Many philosophers (and many of the same philosophers) also believe that moral properties supervene on non-moral properties, and even on naturalistic properties (where a naturalistic property is one such that its exemplification is compatible with naturalism). I agree that they do thus supervene, and argue that this makes trouble for anyone hoping to argue that naturalism can accommodate morality.

Can belief in God be rationally justified? Reviewing in detail traditional and modern arguments for and against the existence of God, Professor Plantinga concludes that they must all be judged unsuccessful. He then turns to the related philosophical problem of the existence of other minds, and defends the so-called analogical argument against current criticisms. He goes on to show, however, that although this argument affords us the best reasons we have for belief in other minds, it finally succumbs to the same malady that afflicts the teleological argument of God.

How does Christianity bear on philosophy? Is there such a thing as Christian philosophy, or are there only Christians who are also philosophers? How should Christianity and philosophy be related? Should they be related? In “Advice to Christian Philosophers” I said that Christian philosophers should display more autonomy: they have their own fish to fry, their own projects to pursue,. Here I want to say more about what these projects are like. And the right way to think about these matters, so it seems to me, is broadly Augustinian. Accordingly, I want to propose a programmatic sketch of a conception of Christian philosophy that grows out of some central Augustinian emphases. I don’t claim, however, that Augustine in fact thought of Christian philosophy the way I shall suggest. The primary focus of my paper is not historical ; what I want to do is make a suggestion as to how we should think about Christian philosophy now; but this way of thinking of the matter grows out of Augustinian roots. It’s worth noting, furthermore, that what is at issue is not just a way of thinking about Christianity and philosophy, but about Christianity and scholarship more generally.

The question is: how should a theist think of justification or positive epistemic status? The answer I suggest is: a belief B has positive epistemic status for S only if S’s faculties are functioning properly (i.e., functioning in the way God intended them to) in producing B, and only if S’s cognitive environment is sufficiently similar to the one for which her faculties are designed; and under those conditions the more firmly S is inclined to accept B, the more positive epistemic status it has for her. I conclude by making some qualifications and applications and exmaining some objections.

So why must a scientist proceed in accordance with methodological naturalism? Michael Ruse suggests that methodological naturalism or at any rate part of it is true by definition: Furthermore, even if Scientific Creationism were totally successful in making its case as science, it would not yield a scientific explanation of origins. Rather, at most, it could prove that science shows that there can be no scientific explanation of origins. The Creationists believe that the world started miraculously. But miracles lie outside of science, which by definition deals only with the natural, the repeatable, that which is governed by law.37 By definition of the term 'science' one supposes; Ruse apparently holds there is a correct definition of 'science', such that from the definition it follows that science deals only with what is natural, repeatable, and governed by law. (Note that this claim doesn't bear on the suggestions that a Christian scientist can propose hypotheses involving such 'religious' doctrines as, say, original sin, and can evaluate the epistemic probability of a scientific hypothesis relative to background belief..