Another way to look at it is this: If scientists discover that something previously believed to be supernatural exists, then it will become natural, as it will have been demonstrated to be part of nature. Some argue that materialism is therefore a useless tautology (a definition that references itself), but this misses the point. The definition of materialism is really more about method; it’s about testable causes that we can investigate scientifically. “Supernatural,” therefore, is untestable magic.
