Deduced
There are a couple of rather famous deductive arguments for the existence of God.
Anselm of Canterbury's ontological argument can be considered to be a direct argument... it explicitly references God.
- It is a conceptual truth (or, so to speak, true by definition) that God is a being than which none greater can be imagined.
- God exists as an idea in the mind.
- A being that exists as an idea in the mind and in reality is, other things being equal, greater than a being that exists only as an idea in the mind.
- Thus, if God exists only as an idea in the mind, then we can imagine something that is greater than God (that is, a being-than-which-none-greater-can-be-imagined that does exist).
- But we cannot imagine something that is greater than God (for it is a contradiction to suppose that we can imagine a being greater than the being-than-which-none-greater-can-be-imagined.)
- Therefore, God exists.
The Kalām cosmological argument, on the other hand, might be considered an indirect argument... it claims the Universe has a cause, but doesn't directly say anything about said cause. Other people, however, have added on to it.
- Everything that begins to exist has a cause.
- The universe began to exist.
- Therefore, the universe has a cause.
In each case, the final sentence, the one that begins "therefore" is considered to be true if one accepts the preceding statements, the premises, to be true. And this is part of what makes them popular. An apologist will walk someone through the premises, seeking agreement with each one, and then present the conclusion as granted. Which I get, because it works. The only way to avoid having to either agree with the conclusion or admit to following faulty logic is to deny one or more of the premises, which are generally held out to be common-sense statements that no-one should have a problem with.
But I was reading about these, as part of my amateur interest in philosophy, and it occurred to me: What do these arguments actually mean, anyway? Sure, they have their "common-sense" meanings, but is that actually what they mean?
Take the Ontological Argument. What does "greater" mean in this instance? How should it be understood? The argument doesn't hold up as well if I substitute "taller" for "greater." Because if it's true that "a being that exists as an idea in the mind and in reality is, other things being equal, taller than a being that exists only as an idea in the mind," it does not follow that if I imagine a being a million feet tall, that there must be some real being that's taller than that. It appears, at least to me, to indicate that imaginary height does not matter. Going back to "greatness," this would seem to indicate that I find whomever I consider to be the greatest, and bestow the title of "God" upon them, but that's where it ends.
Likewise with the Cosmological Argument, what does it mean to "begin to exist?" I like to build plastic models as a pastime. And it's true that at some undefined point in the assembly process, a Mobile Suit or an aircraft "begins to exist." Now you don't see it, now you do. But it began to exist because it was assembled from parts that already existed. It's generally presumed that in the Cosmological Argument that the universe began to exist ex nihilo, but there's nothing in the syllogism itself that requires that interpretation. And because the Big Bang is, effectively an Event Horizon, there's no way of knowing whether the Universe simply sprang into existence, or if our current spacetime is simply the current arrangement of matter and energy that already existed in some or another form. So then, even if it's understood that the Universe began to exist, I'm not sure that this tells us anything, especially if energy may be neither created nor destroyed.
Now, to be sure, I don't think that I've put these two long-standing arguments to rest. I'm not that smart. I'm fairly certain that other people have come up with similar objections, and that someone else has come up with counter-arguments. I'm just surprised that I haven't encountered them, and their counters, more often.
