Proof Mind is Fundamental and Matter Doesn't Exist

[Rational AKD]

While I understand the logic behind this, the conclusions don't follow because the assumptions are not verifiable.  This isn't a reasoned argument as it's based on something that is impossible to test.  It's the same thing we as theists get blamed for when we bring up logical arguments for God.  Something that is not empirically verifiable. 

empirical evidence isn't the only type of evidence. the argument's premises are substantiated by the introspective evaluation of your own conscious experience, and certain laws of logic such as Leibniz Law of Indiscernibility of Identicals.

IMO, the argument stops after point #1. I cannot prove a negative

sure you can. if not possible A, then A is proven false. in any case, you do realize I was disproving a negative, right? I was eliminating the proposition of 'solipsism is impossible' as a reasonable escape. if it's impossible to prove a negative, then you already agree it's reasonable to accept solipsism is possible.