The other minds thought experiment demonstrates this principle that I’m getting at well. It is very difficult to prove that other minds in the universe exist. Such a belief is not falsifiable, and what evidence can be brought to the table to prove such a belief? Consider that perhaps this sort of belief falls beyond the language in which logic is useful, and yet no one would ever consider you irrational for believing that other minds exist in the universe besides your own, and that belief is widely regarded as the default, correct belief for a person to maintain. I think that we tend to regard this belief as axiomatic, because from this assumption, many useful and logical ideas spring forth.

Similar too, although the supernatural is something that is not falsifiable, nor can you conclusively prove that it exists through laying out the evidence, I think that a person can surely be considered rational for positing that the supernatural exists in an axiomatic sense, because as an axiom, that belief allows us to make sense of our experiences in much the same way that the belief that there are other minds allows us to make sense of our experiences.

I must apologize for explaining all of this so roughly, my brain does not begin to function at full capacity until much later in the morning. It’s a very interesting question to think about—standards of rationality, if a person can be rational for believing in the supernatural, and if all of that, can you rationally believe in miracles! And this comment thread made for a nice read, as well.