The bit about 'anything that you can interact with and use isn't supernatural' is a bit weird ... but I see the point.
That would tend to mean that supernatural doesn't exist at all -- simply because you defined it out of existence -- which is a neat trick when you think about it.
4.5 Billion year old earth .... 3.5 billion year old, oldest life forms ... oh, hang on, I forgot about the flood sorting all the fossils, and that light used to travel a lot faster, and the world is only 4500 years old ... Doh!!