I referenced a definition of "nature" earlier in this thread that mentioned nature as being a force in the "material" world. So if nature is just comprised to the material world by definition, then immaterial or spiritual things would be outside of the domain of nature, and by definition that's supernatural.
I'm not arguing against your definition in this instance. I'm merely asking you to provide a description of a supernatural event so that I will know one when I see it. (Well, technically, you claimed you had provided such a description, and I'm asking you to back up that claim).
Ok, assume that the supernatural exists. How do you tell it a part from that which is natural? How do you know that it is not natural? What are the criteria?
A meaningful description of "supernatural" can't simply be "that which is not natural" because it is begging the question. Describe to me "that which is not natural".
Well if you continue down that line of reasoning, you may as well say that science is not certain about how anything works, if all you're going to do is just call all of my examples as being unknown laws of nature.
Science only offers the best possible explanation given our current level of knowledge and understanding. Nothing in science is 100% positively set-in-stone. It accepts the fact that, as our knowledge continues to grow and evolve, so will our theories.
That said, it takes a very rigorous process to become a new piece of knowledge in the body of science, and even more rigorous process to become a theory. This is not a haphazard "We will simply believe this until something better comes along". It is "We will believe this because all current evidence and knowledge points to this".
So, in a way, you are correct in saying that science is not
certain about how anything works; but you are wrong to assume that this uncertainty indicates
a complete lack of knowledge and understanding about the universe.
I await the time when scientists think more like you, so that when I tell them about talking snakes and talking donkeys as mentioned in the Bible, they won't laugh at me and tell me that donkeys or snakes can't speak which presumes they are certain about how the physiology of snakes and donkeys and the laws of nature that guide them.
Once again, the problem with your examples is that there is no verifiable proof that they actually happened. If I were to bring a talking donkey to a scientist, and they thoroughly studied the donkey, verifying that this actually was a talking donkey and not some sort of trickery, and then they had another lab of scientists check it out and verify their results, and another lab after that, and then their results were published in a peer reviewed journal for the rest of the world to test as well, I can assure you, the world of science would not be laughing at me.
On the otherhand, thankfully, if I just go up to a scientist and tell him that 3,000 years ago, somebody wrote that donkeys talk, and therefore it must be true, the scientist will not go and re-write all the theories of science based upon this extremely tenuous heresay.
Another point: There is no "law of science" that says that donkeys can not talk. There isn't even a "law of science" that says animals in general can't talk. They certainly can communicate through vocalizations, which isn't a stretch to see as a precursor to "talking". Furthermore, recent work with dolphins and whales indicate that they might have a rudimentary precursor to language, complete with different dialects among families.
It seems to me that you might be under the impression that there are more "laws of nature" than there actually are. The term actually rankles me a little bit; it sounds so presumptuous.
I think the 3rd condition that I offered would help explain this in general. That is that a supernatural occurrence or whatever can not be explained away as a law of nature. Otherwise, it wasn't supernatural to begin with.
I think if you re-read this you would be able to tell me what was wrong with it.
Just in case you don't feel like it, here it is: If I claimed I had a duck, and you saw it and recognized it as a goose, could I then rebut your claim by saying "No, it can't be a goose, because then it never would have been a duck."
The point is, it never was a duck to begin with. It always was a goose.
If nothing else, God would serve as the best example for the supernatural. That is because He's not from nature since if He created it, that means He was outside of it before it was made. Also, because of His omnipotence. That means that He's not necessarily bound to any law of nature. With a law of nature, only certain things are possible, that is whatever that law says is possible for the situation it applies to, but when it comes to omnipotence, virtually all things could be made possible.
To tell the truth, I am not positive that, if God existed, he wouldn't be supernatural. Maybe you are right there. The problem is that it is not certain that God does exist, so your best example is about as good as proving mythological beasts exist, simply because someone thought up a unicorn.
I'm also not so sure that simply because God created the universe that means he couldn't be a part of nature. Perhaps he is the most natural thing of all, and all of nature then flows from his naturalness.
Lastly, in regards to omnipotence, I really don't see what the issue is with having a law of nature say that "If you are omnipotent, you are allowed to ignore all of the other laws."