Ok, we can agree that a supernatural explanation wouldn't be a scientific explanation. (Because of science's methodological naturalism, which is a heuristic assumption.) But a supernatural explanation could nevertheless be the correct explanation, unless we find some way to eliminate that possibility. There mere fact that it doesn't fall within the scope of natural science doesn't rule it out, unless we adopt the much stronger assumption that the scope of science is coextensive with reality itself, which is metaphysical naturalism. If the supernatural explanation was the true explanation, then we would need to accept that natural science was incapable of producing the correct answer.