This was original presented as a 4 premise argument entitled the Argument for Set. I think you'll find this version much more flushed out.
1. The external universe (EU) is made of physical material and bound by physical laws.
2. The internal universe (IU), such as the mind, imagination, abstract thought, etc, is not made of physical matter and not bound to by physical laws of the EU.
3. So, the properties of the EU and IU must be different.
4. As the properties of the EU and IU are different, one cannot be reduced into the other.
5. Due to #4, the EU and IU must be separate things not reliant on each other.
6. Based on #1-5, the IU must be explained by something immaterial and not bound by physical laws. Further, there must be a logical explanation as to how the EU and IU became mixed as seen in human beings.
7. The EU shows no sign of conscious thought, as it is eternally bound to its laws.
8. Because of #3-6, the IU cannot rise within the EU, it does not arise by chance.
9. #8 implies that the mixing of IU and EU was intentionally caused by something (as per #6) immaterial and not bound to physical laws.
10. A conscious thing that willfully interacts with the material world to create humanity as we know it, which is immaterial and not bound to physical laws, is a very common description of gods from every single tradition.
Therefore, what people call god(s) must exist to explain the mixing of EU and IU, as neither can arise from the other and are separate substances.
Below is the original argument.
1. Something that can go against the mechanistic flow of nature is unnatural.
2. The human mind can – to varying degrees – go against the mechanistic flow of nature.
3. So, the human mind – even if just an aspect of it – must be unnatural.
4. For nature to create something unnatural would be a logical contradiction.
Therefore, the must be something separate from nature to explain the human mind.