Arguments for the Existence of God
Several Short Arguments
Several Short Arguments From Alvin Plantinga
[These arguments are on the Sudath website, they are from lecture notes of Alvin Plantinga, the are not intended to be as comprehensive as the others, but just short reflections to provoke thought]
Not all the arguments on this page are from Plantinga, but most of them are.
XXVIII. Why is There Someting instead of Nothing?
"Why is there anything at all? That is, why are there any contingent beings at all? (Isn't that passing strange, as S says?) An answer or an explanation that appealed to any contingent being would of course raise the same question again. A good explanation would have to appeal to a being that could not fail to exist, and (unlike numbers, propositions, sets, properties and other abstract necessary beings) is capable of explaining the existence of contingent beings (by, for example, being able to create them). The only viable candidate for this post seems to be God, thought of as the bulk of the theistic tradition has thought of him: that is, as a necessary being, but also as a concrete being, a being capable of causal activity. (Difference from S's Cosmo Arg: on his view God a contingent being, so no answer to the question "Why are there anything (contingent) at all?"
XXIX. The argument from positive epistemic status.
"Clearly many of our beliefs do have positive epistemic status for us (at any rate most of us think so, most of us accept this premise). As we have seen, positive epistemic status is best thought of as a matter of a belief's being produced by cognitive faculties that are functioning properly in the sort of environment that is appropriate for them. The easiest and most natural way to think of proper functioning, however, is in terms of design: a machine or an organism is working properly when it is working in the way it was designed to work by the being that designed it. But clearly the best candidate for being the being who has designed our cognitive faculties would be God."
"This premise of this argument is only a special case of a much broader premise: there are many natural (nonartifactual) things in the world besides our cognitive faculties such that they function properly or improperly: organs of our bodies and of other organisms, for example. (Tony Kenny's design argument)"
"Objection: perhaps there is indeed this initial tendency to see these things as the product of intelligent design; but there is a powerful defeater in evolutionary theory, which shows us a perfectly natural way in which all of these things might have come about without design.
"Reply: (1) is it in fact plausible to think that human beings, for example, have arisen through the sorts of mechanisms (random genetic mutation and natural selection) in the time that according to contemporary science that has been available? The conference of biologists and mathematicians ("Mathematical Challenges to the NeoDarwinian Interpretation of Evolution", ed. Paul Morehead and Martin Kaplan, Philadelphia, Wistar Institute Press); the piece by Houston Smith. The chief problem: most of the paths one might think of from the condition of not having eyes, for example, to the condition of having them will not work; each mutation along the way has to be adaptive, or appropriately connected with something adaptive. (2) There does not appear to be any decent naturalistic account of the origin of life, or of language."
XXXI. The Argument from induction.
Hume pointed out that human beings are inclined to accept inductive forms of reasoning and thus to take it for granted, in a way, that the future will relevantly resemble the past. (This may have been known even before Hume.) As Hume also pointed out, however, it is hard to think of a good (noncircular) reason for believing that indeed the future will be relevantly like the past. Theism, however, provides a reason: God has created us and our noetic capacities and has created the world; he has also created the former in such a way as to be adapted to the latter. It is likely, then, that he has created the world in such a way that in fact the future will indeed resemble the past in the relevant way). (And thus perhaps we do indeed have a priori knowledge of contingent truth: perhaps we know a priori that the future will resemble the past.) (Note here the piece by Aron Edidin: "Language Learning and A Priori Knowledge), APQ October l986 (Vol. 23/ 4); Aron argues that in any case of language learning a priori knowledge is involved.)
This argument and the last argument could be thought of as exploiting the fact that according to theism God has created us in such a way as to be at home in the world (Wolterstorff.)
XXXII. The Putnamian Argument (the Argument from the Rejection of Global Skepticism)
Hilary Putnam (Reason Truth and History) and others argue that if metaphysical realism is true (if "the world consists of a fixed totality of mind independent objects", or if "there is one true and complete description of the 'the way the world is'") then various intractable skeptical problems arise. For example, on that account we do not know that we are not brains in a vat. But clearly we do know that we are not brains in a vat; hence metaphysical realism is not true. But of course the argument overlooks the theistic claim that we could perfectly well know that we are not brains in a vat even if metaphysical realism is true: we can know that God would not deceive us in such a disgustingly wholesale manner. So you might be inclined to accept (1) the Putnamian proposition that we do know that we are not brains in a vat (2) the anti-Putnamian claim that metaphysical realism is true and antirealism a mere Kantian galimatias, and (3) the quasi-Putnamian proposition that if metaphysical realism is true and there is no such person God who has created us and our world, adapting the former to the latter, then we would not know that we are not brains in a vat; if so, then you have a theistic argument.
Variant: Putnam and others argue that if we think that there is no conceptual link between justification (conceived internalistically) and truth, then we should have to take global skepticism really seriously. If there is no connection between these two, then we have no reason to think that even our best theories are any more likely to be true than the worst theories we can think of. We do, however, know that our best theories are more likely to be true than our worst ones; hence. . . . You may be inclined to accept (1) the Putnamian thesis that it is false that we should take global skepticism with real seriousness, (2) the anti-Putnamian thesis that there is no conceptual link between justification and truth (at any rate if theism is false), and (3) the quasi-Putnamian thesis that if we think is no link between the two, then we should take global skepticism really seriously. Then you may conclude that there must be a link between the two, and you may see the link in the theistic idea that God has created us and the world in such a way that we can reflect something of his epistemic powers by virtue of being able to achieve knowledge, which we typically achieve when we hold justified beliefs.
Here in this neighborhood and in connection with anti-realist considerations of the Putnamian type, there is a splendid piece by Shelley Stillwell in the '89 Synthese entitled something like "Plantinga's Anti-realism" which nicely analyzes the situation and seems to contain the materials for a theistic argument.
This one is not from Plantinga:
XXXIII. Ultimate Origin must be Personal.
John Hick's argument
Dennis McCallum and Gary DeLashmutt
John Hick has argued that since God is personal, He is not subject to natural law, (e.g. thermodynamic laws) which apply to the physical realm. Therefore, there are fewer problems with His eternity than there would be with the eternity of the physical universe.[footnote 7]7. [John Hick, Arguments for the Existence of God. (New York: Herder and Herder, 1971) pp.34 ff. He also gives other reasons for distinguishing between God and the universe in the area of eternalness.]