1. Nothing can both exist and be outside of nature, as nature is the sum of everything in existence.

2. Nothing that exists can defy the laws of nature. The subjects existence is proof that the laws of nature do not work in such a way that would prevent it from existing. The subjects existence is proof that it complies with the laws of nature.

3. Any assertion of truth in regards to the subjects existence is a claim for its natural existence.

4. The title of supernatural is given to the subject if it is beyond current scientific understanding and the known laws of nature, provided the available evidence was demonstrated to be unreliable or inaccurate.

5. The title of natural is given upon the subjects proven existence. Our understanding of the laws of nature must change to comply with the subjects proven existence. The laws of nature themselves continue to remain in harmony with the subject.

6. Either modification of the known laws of nature or a rewritten definition of the supernatural subject being discussed is required for the subject to exist.

Point 1 through 3 would be the points of contention for someone arguing for the supernatural.

1. By its definition, "nature" is the physical world, while "supernatural" is whatever beyond it. It is conceptually consistent, though it does not mean that such thing can exist physically, like invisible pink unicorns.

2. Nothing that exists IN nature can defy the laws of nature. If it's supernatural, it won't be bound by the laws of nature as long as it does not cross into the natural world.

3. If you consider truth to be existence in the natural world then you're right. But if the supernatural object only exists in the supernatural realm, then you can't apply the rules of the natural world to it.

So, a supernatural object can only exist in a supernatural world, but once it crosses into the natural world it has to play by the natural world's rules. However, the fact that it is possible to cross or affect the natural world would mean that the supernatural object's world is part of the natural world in the first place, because if a connection can be established, then the supernatural is not SUPER(above or beyond)natural anymore.

Therefore, the point is: The supernatural cannot exist or affect the natural world, or it would lose its very definition. The supernatural can exist only in the supernatural world or another worlds that's separate from the natural world, one of which is our imagination.