Ian,
The fact remains that it is a necessary epistemological position for the construction of the scientific method. It is an assumption about the nature of our observations, not about something completely unknowable.
--------------------------------------------------------------------------------
I simply point out that neither materialism or naturalism have to be true in order for the progress of science to take place.
True, but the fact that the progress of science
does take place, constitutes supporting evidence for naturalism.
That is where you are wrong. The above claim, that we could never know such a world, is an epistemological position. The claim that we can know about such a world is also an epistemological position. This is exactly the point of the scientific method.
--------------------------------------------------------------------------------
The point is that the assertion of a reality existing in abstraction of any conscious awareness is a ontological position. Why do I ned to keep repeating myself?? Please take note of what I say and try to understand.
If that is how you define "ontological", then fine, it is ontological. Who cares? The point is that it is an epistemological position, about something which is knowable, rather than blind speculation about something unknowable.
If we do not make any metaphysical assumptions about ontological primacy, and instead rely on science to reveal the logical relationships between consciousness and other stuff, then the hypothesis that our minds cease to exist when we die is clearly well-supported by the empirical evidence.
--------------------------------------------------------------------------------
Only by making the metaphysical presumption that consciousness itself is a physical thing.
What do you mean by physical? If you mean that it has some effect on other observable things, then that is a direct observation. If you mean that it can be described scientifically, then that is an assumption of naturalism, and as I already pointed out, an epistemological assumption, not a metaphysical one.
If you are talking about it being some sort of "physical substance" as per ontological materialism, then this assumption is not required at all for our scientific evidence that consciousness is a brain process.
Science per se does not suggest that consciousness ceases to exist. Given that the world is physically closed, how could it since consciousness cannot be detected or inferred? If consciousness can play no role in our scientific theories it certainly can't declare it ceases to exist when the brain stops functioning!
Here we go again.

Please provide some evidence for your assertion that consciousness, which clearly plays an observable role in the physical world, cannot be detected or inferred, and cannot play any role in scientific theories. That is epiphenomenalism, which neither of us is defending.
Fact: Consciousness has an effect on the observable world.
Fact: Naturalism holds that all observable effects can be explained scientifically.
This means that either consciousness can be explained scientifically, or naturalism is false. If you are claiming that consciousness cannot be explained scientifically, then provide your evidence that this is true.
Human consciousness is pretty clearly a physical process in the brain.
--------------------------------------------------------------------------------
Nothing you or anyone else has ever said, remotely suggests this.

Burying your head in the sand and chanting "I won't believe it" isn't going to make it go away.
So what's the problem then? Why make any metaphysical assumptions about role of consciousness in reality? Why not simply leave it up to science to determine what its role is?
--------------------------------------------------------------------------------
Because consciousness is outside the purview of science. Science in principle can never explain consciousness. To maintain otherwise is to misunderstand the nature and scope of science.
To claim it cannot is to claim that science is invalid, and that its premises are false.
I am afraid I am going to need to see some kind of evidence for that before I believe it.
That does not follow at all. The fact that our only source of knowledge about reality is through our experiences, in no way implies that the existence of reality ontologically depends on our experiences.
--------------------------------------------------------------------------------
I of course never claimed this. Read what I said more carefully. A reality in abstraction from consciousness is unknowable.
Wrong. It is only unknowable if you do not assume that there is a logical connection between objective reality and our experiences. That there is, and more specifically that this relationship allows us to extract information about objective reality from our experiences, is the basis of science!
I didn't say it necessarily therefore doesn't exist. But in supposing it exists you are at the very minimum making a massive ontological leap of faith.
No faith is involved. As I already explained, several times, the premises of the scientific method, of which objectivity is one, constitute a falsifiable hypothesis. The success of the scientific method is supporting evidence for the hypothesis that the premises of the scientific method are valid.
Evidence, not faith.
That link is philosophical nonsense, not science.
--------------------------------------------------------------------------------
Science cannot be so easily seperated from philosophy.
Science is derived from philosophy, but not all philosophy is science. The philosophical speculation on that linked page is
not science. It is metaphysical nonsense.
QM suggests that reality, in abstraction from our measurements, is merely a realm of mathematical possibilities, and it is only a measurement which makes one of these possibilities concrete.
QM suggests nothing of the sort. You don't know what you are talking about. You are just repeating what somebody else told you. We both know that you have no actual understanding of QM.
It is also irrelevant to the issue. You cannot refute the fact that the Universe has existed longer than people have, without completely throwing out the very idea of scientific evidence.
--------------------------------------------------------------------------------
What scientific evidence do we have that reality, before it enters the consciousness of any sentient being, is a unique concrete determined one? Come on Stimp, let's see all your evidence LOL
We have supporting evidence for the falsifiable hypothesis that the universe has existed for billions of years. The appeal to QM to try to claim that the past is indeterminant is nothing more than a fancy rehashing of the old "how do you know the universe wasn't created 5 minutes ago?" nonsense.
A tree that falls down in the woods when nobody is around really does make a sound, Ian. You don't need to take that on faith. You just need to abandon the silly notion that the entire universe is here for your benefit.
You have stated that there is plenty of scientific evidence to suggest that even before any consciousness arose, the past existed in a unique determined concrete sense. I'm wondering what this evidence might conceivably be? So first of all answer this question please.
I didn't say that. What I said is that there is evidence that the Universe existed long before human consciousness did. The above is unfalsifiable metaphysical nonsense.
I would in fact suggest the scientific evidence suggests quite the converse. If QM applies to the macroscopic realm as well as the microscopic (and why on earth should anyone suppose otherwise?), I'm curious as to how a 'un-collapsed' wave-function representing the Universe as a whole can be reconciled with a unique concrete determined past??
Where is your evidence that human consciousness is required to collapse the wave-function? For that matter, where is your evidence that the wave-function is anything more than a useful mathematical tool for describing our observations? You are referring to a metaphysical interpretation of QM as though it were the actual scientific theory. It is not.
Now I find a materialist atheist physicist agrees with me. It seemed appropriate that to pre-empt your inevitable charge that I don't know what I'm talking about, to point out that many eminent physicists agree with me.
Wheeler is not a materialist, either in the sense that you define the term, or in the sense that I do. I have no idea whether he is an atheist or not. Furthermore, I doubt very much that Wheeler "agrees with you". You may find nuggets of what he says that you think you understand, and that seem to be in agreement with your own views, but I suspect that if you explained your views to him (particularly your view that consciousness cannot be scientifically explained), that he would he would tell you that your position is incoherent and irrational.
And even if he did agree with you, one is not many.
Dr. Stupid