Arguments for the Existence of God: Rationality & Logic

I believe in the existence and power of logic. First, let me make it clear that (at this point at least) I’m not talking about our ability to use our reasoning capacities, as great as that is. I’m talking about the objective existence of the laws of logic. I believe that the validity and universality of the laws of logic defy a mere materialistic explanation. Let’s think of the “big 3.” These are the foundational and standard laws of logic found in most Intro to Philosophy books and all Logic textbooks.

1) First, we have the law of Identity. A is A

2) Second, we have the law of the excluded middle, A is either A or Non-A (it cannot be both.). Admittedly, philosophers have debated the validity of this one, but last I checked the debate isn’t over.

3) Lastly, we have the law of non-contradiction (otherwise known as, ironically, the law of contradiction). This law states that P cannot be both A and non-A at the same time and in the same respect.

These laws of logic are universally true and even in denying them we utilize them. For instance, if we say that “there are no universal laws of logic,” we’re taking for a given that that statement is not the same as “there are universal laws of logic,” thus using the law of non-contradiction to argue against the reality of the law of non-contradiction.

Now, I’ve always found this problematic for those who are materialists on the one hand, yet who champion logic, reason, and “free thinking” on the other. I think it’s safe to say that we all (Christian and non-Christian) that laws of logic immaterial. Can we taste, feel, smell, weigh, measure, or hear the law of identity? Can we see the law of the excluded middle? Well, no, of course not. Are they then “not real”? Are they simply social convention? If so, then they aren’t universally binding. But we know that something that’s A cannot be both A and non-A in the same time or in the same respect, whether it’s in our culture or any other. If we throw away the universal validity of the law of non-contradiction, for example, then logically there’s no difference between Atheism and Christianity. But, of course, there is.

So, where do these laws originate? Why do they fit so perfectly with the world? How can we account for their universality? Those are important questions. If they were only social conventions, they we’d be saying that they don’t really exist. But if they this is the case, why do they always accurately reflect the external world? Why can’t we think without assuming their truth?

Now, I can imagine what someone might be thinking here. “Ok, ok, you’ve made your point. But how does the Christian makes seem of logic?” I honestly can’t think of laws of rationality being material “things.” They’re immaterial. But laws of thought govern minds (not merely brains). So, ultimate laws of rationality reflect an ultimate Mind. Without getting terribly into details, Christianity teaches that God the creator is a rational, orderly, logical being. The laws of logic simply describe to us how God thinks. Since we’ve been created in God’s image (as finite reflections of God on earth to represent Him) we think like him, though on a finite scale.

For instance, to say that my car is blue all over and yet say that it is the case that it is not blue all over is to, essentially, to affirm a falsehood. God is a God of truth and since I am to reflect His character, I should not affirm falsehoods or lies (thus abiding by the law of non-contradiction). Similar examples could be given regarding the other 2 laws. So, from a Christian theistic worldview, the universality and accuracy of logical reasoning are affirmed and grounded in my belief in not just any God, but specifically in the God of the Old and New Testaments, Yahweh.


Posted on April 1, 2013, in Christian Worldview, Presuppositional apologetics and tagged , , . Bookmark the permalink. 1 Comment.

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