Proof Mind is Fundamental and Matter Doesn't Exist

[Captain Scarlet]

Argument:
1. a metaphysically solipsist world (a world where only a mind exists) cannot be proven false due to epistemic limitations.
2. it is unreasonable to presume solipsism is impossible given 1, therefore it must be reasonably granted solipsism is possible.
3. given 2, it is possible for mind to exist in a solipsist (immaterial) world while it is not for matter.
4. there is therefore something that it true of mind but not of matter. this means they cannot be the same thing and mind is not reducible to matter.
5. substance dualism has been proven false due to the interaction problem (substances can only interact via shared properties and substances cannot be fundamental and share properties).
6. therefore, all is mind and monistic idealism entails.

Premise 1 and 2 is flawed to me.  Solipsism would produce a consciousness conscious only of itself and thus a metaphysical contradiction.  To be conscious is to be conscious of something, meaning there has to be an external reality. For this to be valid you would also have to deny the primacy of existence and assert the primacy of conciousness, which leads to contradictions.  The mind is an apparent emergent property of physical substrates (higher functioning brains). We know of no counter examples, meaning there is strong empirical support for this notion. Of course this is not proof, but we are fully justified in believing our senses are valid and that we can perceive external reality. It seems to me that you have to deny this to validate idealism, and thus (again to me) you end up cutting your own head off, to prove you have no head.