Here’s a thoughtful email query I received with the title “Friendly Question about God and Logic”:
Recently, I have been reading about God and abstract objects and came across your article in Phil-Christi with Greg Welty regarding God and logic. I thoroughly enjoyed it and found it both persuasive and useful. In doing further reading on your website I came across a follow up article where you argue that atheism presupposes theism (and so does every other ism) and your argument gets close to an objection to the claim that logic depends on God that I have long wondered about. In the article, in reference to Atheism you argue the following:
(1) God does not exist. [assumption for reductio]
(2) It is true that God does not exist. [from (1)]
(3) There is at least one truth (namely, the truth that there is no God). [from (2)]
(4) If there are truths, they are divine thoughts.
(5) There is at least one divine thought. [from (3) and (4)]
(6) If there are divine thoughts, then God exists.
(7) Therefore, God exists. [from (5) and (6)]
Consider the following reconstruction:
(1*) God does not exist. [assumption for reductio]
(2*) It is true that God does not exist. [from (1*)]
(3*) There is at least one truth (namely, the truth that there is no God). [from (2*)]
(4*) Therefore, truth does not depend on God. [from (1*) and (3*)]
Let me make explicit why I think (1*-4*):
(5*) The laws of logic are divine thoughts.
(6*) According to the aseity-sovereignty doctrine if God did not exist then nothing would exist.
(7*) If God did not exist there would be no divine thoughts.
(8*) Therefore, there would be no laws of logic.
But if (5*-8*) hold, the proposition either God exists or He does not, would be a truthful description of that state of affairs and be an instance of the LEM. Likewise, the proposition God exists, would be false, not true. Not both true and false, thus an instance of the LNC.
Or another way of stating it would be:
If God did not exist then nothing would exist. But it seems that even if God did not exist there would be at least one thing that would exist, the state of affairs, nothing exists. Doesn’t that imply/entail that there is at least one truth about that state of affairs, the truth nothing exists? If that is the case don’t we have laws of logic?
I assume my objection is misguided in some way. If you have time to address this question and clarify my error I would appreciate it.
Chris Bolt has some good comments on the old canard that “conversions do not come about through argument.” To his apt observations, I would only add the following:
Now when they had passed through Amphipolis and Apollonia, they came to Thessalonica, where there was a synagogue of the Jews. And Paul went in, has was his custom, and on three Sabbath days he reasoned with them from the Scriptures, explaining and proving that it was necessary for the Christ to suffer and to rise from the dead, and saying, “This Jesus, whom I proclaim to you, is the Christ.” And some of them were persuaded and joined Paul and Silas, as did a great many of the devout Greeks and not a few of the leading women. (Acts 17:1-4)
When they had appointed a day for him, they came to him at his lodging in greater numbers. From morning till evening he expounded to them, testifying to the kingdom of God and trying to convince them about Jesus both from the Law of Moses and from the Prophets. And some were convinced by what he said, but others disbelieved. (Acts 28:23-24)
Preaching instead of apologetics? No. Preaching with apologetics.
Having been recently promoted to associate professor, I was invited to give a short lecture at our Fall convocation service last week. The audio of the lecture (“The Atheist’s Guide to Intellectual Suicide”) is now available on iTunes U.
On a closely related note, check out these good thoughts by my colleague Mike Kruger on the current state of public debate over moral issues.
A correspondent asked me if I could address an objection he had encountered to the argument for God from logic. Here’s the objection as he quoted it, with my comments interspersed:
The authors equivocate when they make the leap to claim that the laws of logic are thoughts. The propositions themselves are certainly thoughts, but how can the truths that the propositions bear be thoughts?
I’m pleased that the objector concedes that “propositions … are certainly thoughts” because that’s a crucial step in the argument! However, the latter part of the question reflects a confusion. In our paper, we adopted the conventional definition of propositions as primary truth-bearers. But this doesn’t mean that propositions bear truths (as though truths were something other than propositions). Rather, it means that propositions are things that can bear the property of truth; they’re things that can be true. Given this definition, truths just are propositions; specifically, they are true propositions.
The Gospel Coalition invited me to write a short review of Mitch Stokes’s book A Shot of Faith (to the Head). It isn’t exactly “Alvin Plantinga’s Apologetics for Dummies” (as another blogger put it) but it’s pretty close — and in a good way!
Dr. Owen Anderson of Arizona State University has posted some thoughts on my TGC article, “Can We Prove the Existence of God?”
I’m gratified that he thought the article worth commenting on; I only wish he’d read it a little more carefully. I was planning to respond before I discovered that the Pilgrim Philosopher has saved me the trouble.
Update: Owen has posted a reply here and there has been some interaction in the combox.
The Gospel Coalition invited me to answer the titular question in two thousand words or less. Go here to read the result. Unfortunately, due to the word limit, a number of witty asides and clever illustrations from the first draft didn’t make the final cut. (You’ll just have to take my word for that.)
My good friend and colleague Mike Kruger has just launched his own website and blog. Check it out! It has lots of excellent material already, and more to come no doubt.
While you’re at it, you should also pre-order his latest book, Canon Revisited. As far as I know, this is the first evangelical introduction to canonics to closely integrate the history of canon with the theology of canon. It will fill a conspicuous gap in the literature. It offers, in effect, what I would call an “evidential presuppositionalist” defense of the Protestant view of the New Testament canon.
The Gospel Coalition is running a series on methods in apologetics. The latest installment is “Questioning Presuppositionalism” by Dr. Paul Copan, who raises four criticisms of presuppositionalism, one of which is the old canard that presuppositionalists engage in fallacious circular reasoning. (I think all four are misguided in one way or another, but the other three will have to wait for now.) He writes:
First, it engages in question-begging — assuming what one wants to prove. It begins with the assumption that God exists, and then concludes that God exists. Such reasoning would get you an “F” in any logic class worthy of the name!
Dr. Copan is a gentleman and a scholar, so I’m sure he doesn’t realize quite how insulting this sounds to presuppositionalists! (For comparison, imagine someone claiming that evidentialists commit the fallacy of affirming the consequent because they use inductive inferences.) This criticism has been answered many times, so it’s disappointing to find it cropping up yet again (although perhaps presuppositionalists should take comfort from the fact that Dr. Copan doesn’t offer any new criticisms!). Even so, I’ll try to explain one more time why this complaint so badly misses the mark.
Michael Sudduth, a philosopher of religion at San Francisco State University, has caused quite a stir by announcing his departure from orthodox Christianity and conversion to Gaudiya Vaishnavism (a form of Vaishnava Vedanta Hinduism). Having known Michael for over a decade, and having had many profitable philosophical discussions with him, I was extremely grieved to read this announcement, although it didn’t come completely out of the blue. Some mutual friends had informed me of his increasing interest in Eastern religion and his gradually distancing himself from biblical Christianity. We had an email exchange last year when I raised some concerns (my last email, it turns out, was sent several days before his “profoundly moving religious experience of Krishna”) but it quickly fizzled out because Michael wasn’t ready at that time to set out his views in detail.
I’m not going to comment on his conversion testimony or on the complex personal experiences and circumstances that led to it (only some of which are mentioned in that testimony). However, I do want to remark on one particular statement:
Consequently, I now accept a panentheistic metaphysics in which the universe and human souls are, to put it roughly, in the being of God.