Well, the whole body is sensible, from toe to head. Every part of it, with more or less detail, is able to provide sensations of temperature, density, texture, pain, etc. So, if the whole body is the source of the experiences, and consciousness is based on them, it is logical to assume that the whole body is part of it.
Yes, part of it - the part that does the input. This is the task of the body, to provide sensory input. The brain is where it all is put together into a subjective experience.
I see no mystery. In the computer example, no, the CPU does nothing UNLESS IT IS CONNECTED TO THE REST OF THE COMPUTER. Otherwise, is just a collection of transistors.
This is where this analogy reaches its limits. A brain is more than just a cpu, it is also a RAM and hard drive. Obviously brain has evolved to deal with sensory input, so I honestly don't know what would happen to a brain that was born without any sense data at all. But a brain that already has some data, it has no need for a body (except to keep him alive, but in this hypothetical that's already covered). Take isolation tanks for example. The reduction of sensory input does not lower the consciousness, in fact, if anything, it does the opposite. Or a better way to say is it
alters it.
LOL! You have to resort to "how things really..:" I know, the temptation is way to big. The problem (AND THIS GOES FOR EVERYONE IN THE DISCUSSION) is that we are accustomed to have an ontology, we are used to take for granted that there most be an ontology. Well, my ideas are based on the assumption that we don't need any ontology, which, of course, its perfectly compatible with Model Dependent Realism. That said, some philosophers of mind have worked on the same model you rise, differenciating the "content" of the experience from the experience. IMO, this is nonsensical. The experience is based, per definition, on its contents.
The experience is
based on its content, if by "based" you mean what's it about. The experience itself is something else. It's like a roll of film. The roll itself is not what it projects. So the mind puts together the content of the experience into a roll that it plays to itself.
I understand your point, mine is exactly the opposite; The ONLY thing we have, is our subjectivity. We live immerse in our EXPERIENCE, not in "the universe" as this last one is a construct (a model) designed to accommodate the experience. Again, I most point to Model Dependent Realism articles in order for this to be clearer.
I think it's a matter of living in our world to realize that all what you know might not be
true (if there is no "really" in your philosophy, as I understand it, is there a "true/truth"?) and your sense input can not be the sole arbiter of real vs non-real. Apart from we having scenarios showing it to be non-functional model for reality (hallucinations, illusions), it would make science nonsensical. This view
is solipsistic.
Regarding your last sentence, I argue that the magic happens where the brain meets the senses, not before, not after.
By "where" I presume you meant "when" (otherwise it's a nonsense statement to me). So, simultaneously? I simply don't think that's true. And the original question was, after all, "where", not "when". It takes place in the brain.
After the sensory input has reached the brain.
Because those problems only arise if we sustain some form of naive realism.
Just to be clear, I don't sustain any form of naive realism, as I have pointed out. And these hypotheticals can be brought forward with
any philosophy that distinguishes between and acknowledges objectivity and subjectivity.
Ultimately, there are no "truths". Either our models represent the observations or they do not. But if another model represents the same observations we cannot determine if one model is "better" than the other. It is a futile exercise.
In that context I see no practical difference between "truth" and "ability to represent the observations".
Not solipsistic at all, there are other beings around us, from animals to other humans and (most likely) other forms of life in the universe. Regarding Ben, yes, it is true, FOR HIM FB does not exists. If he is introduced to it, merely by someone talking about it, at that point he is presented with the first clue, or evidence, that might lead him to experience it.
Sure, you would say that it is matter of incomplete knowledge, and that FB "really exists"... and again, I would bring Model Dependent Realism to the table
Ok. The thing here is that you have as many sets of realities as you have subjective observers. I would solve this problem with applying a simple everyday label "lack of knowledge", but according to you there is no such thing, there are only models, each one as true as the next one, they simply represent different observations. Is that correct?
As a sidenote:I haven't read up on model dependent realism, I've been going on only what you've said here. At this point, it seems... impractical.