Geoff said:
Can we try a new approach?
Happy to.
We seem to have a situation where the pair of you think that you have a solution to the problem, but that I can't see why it's a solution. So perhaps I shall explain exactly what the problem is and you can tell me why you think your solution works. I need you to try to understand the problem from my viewpoint and that means temporarily suspending any belief in materialism in order for me to explain the problem:
As explained to Paul before, everything we ever experience is subjective. We are trapped in our own mental realm. For all we know, solipsism may be true. Please don't complain that I am using "dualistic talk". I need some sort of way of specifying the problem and "We are trapped in our own mental world" is the only way of specifying it. Now, I don't care at this point if you want to think to yourselves that this "realm of subjective experiences" is a shorthand notation for something mind-independent like a brain proces, but you can't insist (at this point) that I also use it as a shorthand notation for something else. I need it to refer to my own subjective realm - all my experiences - because this is this very thing that needs to be explained.
Okay.
There are experiences. My experiences. At this point the word "experiences" has only one referent. I am the solipsist. Nothing exists but my experiences. "experiences" doesn't refer to anything independent of my mind, because there are no things which are independent of my mind.
I think the solipsist would say there is an experiencer and experiences. Not sure, though.
Where do we go from here?
Well, let's now assume that there is a world external to my experiences - I'm not a solipsist after all. Let's call this external world "physical". What I want to know is how this external physical world relates to my solipsistic world of experiences. Of crucial important is the following:
I know nothing of this external physical world. I have merely posited it's existence. I have no direct, incontravertible evidence that exists at all. From my perspective (stuck in a subjective world where solipsism could be true) it is merely an informed fairy-tale. It is in fact an abstraction from my experiences - something I have proposed/concluded exists via a line of reasoning. It's not something I'm sure exists, however powerfully I might believe it exists.
You do have some indirect evidence, but this is fine.
Now comes along Wasp and Paul and they say they want to defend the view that the only reality is physical reality. They have claimed that the only thing which actually exists is something which from my subjective point of view is a mere abstraction. This is already quite difficult to swallow, because it is a claim that the only thing which exists is independent of my subjective experiences, and my subjective experiences are the only thing I am sure exists. But let's press on and look at the explanations that Wasp and Paul are offering for their claim. They ask me to recognise the difference between a physical process and description (abstraction) of a physical process. Now, if we remember that this external world, from my point of view, is already a mere abstraction, then the difference between the two things wasp has called "internal" and "external" - the difference between the process and the description of the process - is that one is a first-level abstraction and the other is a second-level abstraction. The final part of the claim made by Wasp and Paul is that this second-level abstraction IS IDENTICAL to what I am calling "subjective experiences" or my solipsistic world.
Is that agreed?
This is not a view I want to defend. The solipsist may be right. The idealist may be right. But I'll play the physicalist.
The physical world is not an abstraction. Granted, from the subjective point of view it is, but I am claiming it is real and physical. So now my subjective experience is an abstraction of the physical world. The process by which this abstraction comes about is a physical process.
The problem with this view is this: The abstraction from my experiences which we are calling an external physical world has been defined as being external to my subjective experiences. This means that physical processes which involve information-processing are also external to my subjective experiences - they are also mere abstractions because they are just abstractions of abstractions. They are a model within a model. And if you were to add another level of description to this all you would be left with is an abstraction of an abstraction of an abstraction - a model within a model within a model. Each time you add a layer of abstraction to the already abstract external world you just get further away from my solipsistic subjective world. Please can you explain how your solution overcomes this problem, because I don't understand.
I do not think the physical world is an abstraction, so it is not a problem. When we reject solipsism, we reject the primacy of the subjective viewpoint, so the physical world is no longer abstract in relation to something else.
The reason I think my solution works and your doesn't is because mine provides an anchor for the subjective world of experience. That anchor is the thing I call "Being" from the neutral perspective and "the subject" from the subjective perspective. Now the accounts of abstractions of abstractions can work. Now your 2nd-order descriptions of processes in the external world can become all the things apart from Being that is needed to create my subjective experience. Now the claim "brain processes are minds" can be correctly stated as "minds are brain processes + Being" and all of the problems evaporate. The noumenal has been replaced with physical and mind is explained by the addition of the subject/Being. But you don't want to allow me to add Being. Please explain to me how you can remove Being from this picture and still provide an "anchor" for the solipsistic world of subjective experiences. Please explain why those subjective experiences don't just remain models within models, all happening in some world mind-independent world.
Once the physical is the nonabstracted thing, then it can be the anchor.
It may indeed be the case in philosophy that if you insist on the solipsistic subjective viewpoint as paramount, you have provided a solution that cannot be provided by a nonneutral monism. Notice that you need to redefine
mind a bit, something that you were complaining about when we did it. You now have a being/brain process duality, which seems to me just another take on mind/body duality.
Now, it may be that someone cleverer than I can simplify your metaphysic so that we can retain the primacy of solipsism but not require quite so much baroque complexity. However, is philosophy really so anthropocentric as to require the solipsistic viewpoint?
~~ Paul