Nils wrote: ↑Sun Apr 22, 2018 11:43 pm
I think that we have to be more precise. I think that there are universal mathematical properties or rules ( I am unsure which is the best wording). But if that means that “mathematics” can be said to “exist”, I don’t know. Perhaps it is preferable to call it “potentially existing” as you do.
With 2) I agree.
Stating that some things exist potentially doesn't absolve us of how or where this potentiality exists. In the case of possible worlds and their laws of physics, the number of potentials are obviously infinite but each and every one of which may be instantiated, otherwise they would not be potential. And we know of at least one potential world that was actually instantiated.
Regarding mathematics, I don't agree at all that math is potential (nor is logic for that matter). A square circle is not a potential because it is not a thing to begin with, it is a logical contradiction. Similarly, 2 + 2 = 5 is not a potential that can ever be instantiated in any potential world because it is false. So no, math is not a potential, it is a universal truth and its existence must have an explanation independent of the human mind.
Nils wrote: ↑Sun Apr 22, 2018 11:43 pmYou say that “there must exist an explanation for everything”. I don’t agree at all. With a materialistic world view there is no ultimate explanation of everything.
And that's the self-defeating position materialism necessarily entails. Materialism claims to have a materialistic explanation for everything except explaining the reality in which it makes such claims. If I were to tell you I have a book sitting on a shelf, the shelf has sturdy brackets with solid steel screws and anchors. But the shelf is not attached to anything. Have I explained how the book sits on the shelf? Of course not. That's the materialist's worldview in a nutshell, when it comes to the ultimate explanation they balk and claim brute facts with no explanatory power, therefore nothing is explained.
Nils wrote: ↑Sun Apr 22, 2018 11:43 pmWith a theistic world view there is a God and I have never heard that a God can be explained. Some say that God doesn’t need an explanation but that is ad hoc.
I don't know who you've been talking to but God is neither ad hoc (like the brute facts claimed by materialism) nor lacks an explanation. I meant when I said that everything must have an explanation and that includes God. This ties in with the other thread I was having with our friend the professor, in which I was discussing the Principle of Sufficient Reason.
To summarize:
- Everything must have an explanation
- Either the explanation is extrinsic, in which case the thing explained is contingent on the thing that explains it
- Or the explanation is intrinsic, in which case the thing explained is not contingent on anything but absolutely necessary.
Nils wrote: ↑Sun Apr 22, 2018 11:43 pmTo me it seems that there is no possible world where for instance the properties of the natural numbers (1, 2, 3, … ) are not valid. I have no idea how to explain that or explain that there is something instead of nothing. I am pretty sure that nobody can do that.
But of course we can explain it. My aim in this thread is to show how.
Nils wrote: ↑Sun Apr 22, 2018 11:43 pmWhen you wrote earlier “1) that the world around us (in fact, reality itself) is intelligible”, I agreed but I should have made a reservation. I don’t think that the origin of everything is knowable or intelligible. But I don’t know if this is important for the further discussion.
Nils
Of course it's important, it goes to the heart of our discussion. On the one hand, on materialism, there is no ultimate explanation for reality, therefore no ultimate explanation for anything. On the other hand, on theism, there is an explanation for everything, God included.