Cephus
let us try and clarify the point by using inductive reasoning.
1. The definition of "Supernatural" is attributed to some force beyond scientific understanding or the laws of nature. in accordance to an accredited dictionary. FACT
2. A "Thought" is beyond scientific understanding or the laws of nature (see premise 1). It is familiar to everyone, however, there is no generally accepted agreement as to what thought is or how it is created (see link to Wiki). It is an unknown quantity that falls within the definition of premise 1. FACT
3. In accordance to premise 1 and 2 a thought is a supernatural event, therefore, your statement "You cannot demonstrate that there is any such thing as the metaphysical. You cannot demonstrate that there is any such thing as the supernatural" is a nonsensical prevarication that should insight you into an apology to Savagewind.
Furthermore
1. God is, according to atheists, and unknown Being unexplainable by naturalistic laws. FACT
2. God is therefore a supernatural, metaphysical entity, just as a thought is. FACT.
3. It is a fact that we think, therefore, it must follow that God must be a fact as well and our thoughts a part of our spirit.
It all clicks into place, logically and rationally, it is called the Plan of Redemption.