Non-existence

[Jon Paul]

If I'm unconscious then my brain is not operating the same is it? If I'm in a coma I'm different.

But that doesn't prove a neccessary causal link exists between brain activity and consciousness generally. To prove that generally, you would have to do so from general naturalistic principles, without appealing to your own conscious experience. All your consciousness proves is that you have conscious experience of your brains activity, it proves nothing about the cause of it.

Regardless of if consciousness makes a difference or not, we know that it is effected when the brain is. And there's no evidence to anything further. No evidence that it's a property of anything, just that it's effected when the brain is. So there's no reason to believe it's anything seperate to the physical workings of the brain. I have self-evidence of it, but not that it's a property of anything. However - as I said, we do know that it's effected when the brain is, and to simply say that 'everything could just be consciousness' - is purely semantical; because our experience is exactly the same whether we say this universe is 'all in the mind'...or not. Unless you have evidence to the contrary.

While it's true that philosophical zombies grants the existence of the brain and exactly uses the brain as the explanation for everyone elses behaviour, that is because philosophical zombies is a realist ontology, which is far more complex than solipsism which acknowledges the existence of nothing beyond nor outside of the conscious experience of sense-data, and since all knowlege we have about the brain (in that scenario) is based on conscious experience of sense-data, it is not sufficient to refute solipsism to speak of the brain, something whose existence the solipsist does not acknowledge.