Back in December of 2009, Mitchell LeBlanc of UrbanPhilosophy.net composed what he thought to be a possible disproof of the existence of God. The following day I had posted a rebuttal in response to his disproof. Given the exquisitely complex manner in which he formulated his argument, it isn’t really surprising that many people struggled to wrap their head around what exactly his argument was positing. As it usually goes in these things, the argument made good sense to LeBlanc himself, who said he was “amazed at the misunderstanding” that resulted. I’ve been in those shoes myself at times, when an argument is perfectly clear to me but the way I shared it with others left them baffled and confused. As I’ve said elsewhere, that is one of the primary reasons I blog; it allows me to constantly refine how I articulate myself, so that it becomes accessible to a larger and larger audience. I am always searching for ways to bring my language down from the mountain peaks of philosophy to the valleys of English. (I’m getting better, but I’ve still got a long way to go.)

The argument

To briefly refresh our minds, allow me to repeat what his argument had been. (And we must keep in mind that it targeted the biblical God.)

(1) If God exists, then God is necessarily omnipotent and necessarily triune.

(2) If God is necessarily omnipotent, then God necessarily can bring about any logically possible state of affairs.

(3) If God necessarily can bring about any logically possible state of affairs, then God necessarily can bring about a state of affairs that is brought about by a being that is not necessarily triune.

(4) If God necessarily can bring about a state of affairs that is brought about by a being that is not necessarily triune, then God is not necessarily triune.

(5) Therefore, God does not and cannot exist.

As I pointed out in my rebuttal, this argument does not belong to LeBlanc so much as it belongs to atheologist Michael Martin, [1] with LeBlanc substituting “triune” for every instance that Martin used “omniscient.” Given the doctrine of divine simplicity, such a substitution should be acceptable for the Christian.

What Martin was trying to show, and by extension LeBlanc, is that the existence of God is disproven by reason of logical contradiction; i.e., that God cannot exist. He takes two particular attributes of God and attempts to show that a contradiction results. In the case of this argument, those attributes are omnipotence and triunity.

As indicated in my aforementioned rebuttal, (1) and (2) are not contested since they reflect orthodox Christian doctrine. With regard to (3), LeBlanc later informed me that “a being that is not necessarily triune” would be some human, such as Bob who in some way caused flooding in Toronto (e.g., “Ryft on ‘A Possible Disproof of God’s Existence’”). Consequently, my previous rebuttal loses its traction, since I hadn’t understood that a secondary being was playing a relevant role (i.e., I’d thought God was the only being employed in his argument). But his argument is not saved by this clarification, since the derailment occurs now at (4) instead.

The analysis

We can accept (1) and (2), and it seems we can also accept (3) if it is predicated on God bringing about a state of affairs that was brought about by Bob. However, it’s not at all clear how (4) should follow. If God should bring about (principal cause) a state affairs that is brought about by Bob (instrumental cause), [2] how does it follow that God’s nature is thereby identical to Bob’s nature? That is, how did God become not triune by virtue of Bob being not triune? LeBlanc does not say, nor is it immediately obvious.

Perhaps LeBlanc rejects there being any distinction between types of causes, such that God is said to be the instrumental cause of all effects. If that is the case, then I think it becomes obvious how (4) follows. But if God is the instrumental cause of all effects, then all effects (or states of affairs) amount to “God in motion”—which in essence amounts to panentheism and is dramatically antithetical to God as revealed in the Bible (who the argument is intended to address, i.e., it qualifies as a straw man). So if that notion and its presuppositions are what is proposed by (4), then it must run afoul of such doctrines as aseity, necessary being, divine simplicity, transcendence and so forth, which tell us that necessarily nothing of God’s nature is identical to his creation. What God ordains should come to pass (principal cause) is a product of his nature; however, the means by which it comes to pass (instrumental cause) is a product of his creation which he exists independent of. So Bob by nature is not necessarily triune, but this has no bearing on whether or not God by nature is triune.

Hopefully I have not misunderstood his argument still. We’ll have to wait and see how he responds to find out if I’ve grasped his point aright.

References

1. Michael Martin. Atheism: A Philosophical Justification. Temple University Press, 1990. p. 310 (as cited by LeBlanc).

2. Bob: instrumental cause that is itself an effect; contingent. God: principal cause that is not itself an effect; necessary. So, not identical; i.e., distinguishable types of causes.

Mitchell LeBlanc, owner of UrbanPhilosophy.net and Philosophy of Religion student at University of Toronto, has recently proposed “A Possible Disproof of God’s Existence,” which is basically a slight reformulation of an argument presented by Michael Martin about twenty years ago, [1] wherein LeBlanc simply replaces all instances of “omniscient” with “triune” instead. In this argument he attempts to prove that God does not exist—indeed cannot exist—by reason of a logical contradiction. Whether or not his argument achieves its aim shall be the subject of this brief article.

Although I will not be analyzing Martin’s argument directly here, I will be doing so indirectly since LeBlanc’s argument is essentially identical to it; therefore, any criticism that applies to one will apply to the other. The argument LeBlanc constructs is as follows:

(1) If God exists, then God is necessarily omnipotent and necessarily triune.

(2) If God is necessarily omnipotent, then God necessarily can bring about any logically possible state of affairs.

(3) If God necessarily can bring about any logically possible state of affairs, then God necessarily can bring about a state of affairs that is brought about by a being that is not necessarily triune.

(4) If God necessarily can bring about a state of affairs that is brought about by a being that is not necessarily triune, then God is not necessarily triune.

(5) Therefore, God does not and cannot exist

What LeBlanc is attempting to argue for here is that God possesses attributes which logically contradict each other. To fashion an argument which proves that God cannot exist is something of a Holy Grail to many atheists, and continues to be every bit as elusive as that mysterious chalice. In this argument LeBlanc reaches out to grasp it but finds only air, for his argument commits a substantial error in reasoning.

Given the first two premises (which must be given, as we are confronting orthodox Christian theism), his third premise ought never obtain; i.e., in order to obtain (3) LeBlanc is forced to contradict (1) and (2)!

How so? Consider what it is that (3) asserts: that God necessarily can bring about some X such that it was brought about by a being that is not necessarily triune. But given (2) which defines omnipotence as being able to “bring about any logically possible state of affairs,” and given (1) which defines God as “necessarily triune” (it is not logically possible for God to not be triune), we therefore observe that (3) contradicts these very premises—so that it is not God who vanishes in a puff of contradiction but rather LeBlanc’s argument.

[1] Martin, Michael. Atheism: A philosophical justification (1990), pg. 310, as cited by LeBlanc.

Over at UrbanPhilosophy.net is a Philosophy of Religion student from the University of Toronto, Mitchell LeBlanc, who has been endeavouring to make a case against presuppositional apologetics. Coursing a new direction from his original first three drafts, [1] perhaps due to the daunting scope of such a task or perhaps due to the criticisms from Chris Bolt and others at ChoosingHats.com, [2] the final draft version of the article [3] targets the Transcendental Argument for God (TAG) as argued for by the late philosopher Greg L. Bahnsen from Covenant Media Foundation.

As did his mentor Cornelius Van Til, Bahnsen defended the transcendental argument as singularly the only cogent and self-consistent Christian apologetic method by virtue of being uniquely grounded upon the distinctive presuppositions of revelational epistemology. [4] Van Til’s extensive work is considered by some to be a contribution to Christian philosophy of Copernican dimensions, [5] wherein he demonstrated by indirect proof the existence of God as the necessary precondition for the intelligibility of reality and the human experience thereof, such that God, as affirmed by Christian orthodoxy, is not a conclusion drawn from rational argument (evidentialism) but is logically prior to any reasoning at all (presuppositionalism). [6] As Van Til framed the matter in his An Introduction to Systematic Theology, “Unless God exists as ultimate [and] self-subsistent, we could not even know anything; we could not even reason that God must exist, nor could we even ask a question about God.” [7]

LeBlanc at this point holds a considered view that the TAG is not merely debatable but in fact false, taking as his point of evaluation the fundamental laws of logic, concluding that they “cannot depend on the Christian God” and therefore the TAG “is not sound”—and must remain so “pending further defense” thereof. His bold conclusion notwithstanding, we may inquire with skepticism whether or not LeBlanc really has successfully defeated the TAG as it already stands, never mind its further defense.

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