lifegazer said:
The perception of all things (including brains), is via sensation (primarily that of the sensation of light). When we 'see a brain', for instance, we are actually seeing the sensation of light organised to give the impression of a brain. Likewise for any 'thing' we see.
Therefore, the only established truth here is that there is a link between sensation [of a brain], thought & feeling.
What seems to be happening in this convo is that a number of people are arguing the case between the link that exists between real brains and thought & feeling.
But the important point to regard here is that scientists can only study the sensations that give the impression of our world/brain. Hence, the only truth science establishes is that which I mentioned at the end of the previous paragraph.
This is very important. What we see here is that science does nought but establish a link (order) between sensations thoughts & feelings. Science does not and cannot establish a link between real brains and thoughts/feelings, because science cannot study real brains.
So we see that this long discussion about split-brains has been a complete waste of everyone's time, because the most that anyone can prove here - even if we (Ian and myself) believe everything you tell us - is this:
Within the awareness of an observing individual, it appears as though there might be evidence that supports the notion that there is a link between each half of a sensed-brain and thought/feeling. So:
(1) "We SENSE Paul (the subject of the initial claim by Bod). Note that the sense-of-Paul within the observer's awareness, is not the reality of Paul. This applies to any 'thing' sensed.
(2) We SENSE sense-of-Paul's brain.
(3) We note that each half of this sensed-brain is possibly linked to separate thoughts/feelings.
... From the above observations/sensations, we cannot even be sure that Paul exists, least of all his brain. Therefore, if we cannot even prove the reality of one [external] individual from our studies, we certainly have no evidence for the existence of two separate individuals.
The only truth that anybody can establish, is that of Individual awareness; of 'things' sensed therein and of a set of thoughts & feelings experienced by that individual.
We're back to page 1. An argument that has been completely overlooked and by-passed for 6 pages of completely irrelevant material.
I've said it before and I'll say it again:
There's not a single scientific fact in any science book in the world which lends merit to the philosophy of materialism/realism (whatever you wanna call it).
Thankyou.
While this is true, it basically means that, without assumptions, nothing certain can be known. Even your so-called 'truth' relies on base assumptions, as demonstrated previously.
One key assumption which must be decided is whether or not the sensations that the individual has in any way relate to real things. For the purposes of survival, the apparent answer is that they do; therefore, it is reasonable to assume that sensations are reflections of real things.
However, we are free to reject this assumption; which leaves us with the concept that our sensations are either an inaccurate reflection of a real world; an illusion which disguises the real world from us; or pure illusions founded on nothing. If the first were true, then we might be able to discern clues that tell us the true nature of the world, and how our illusions are different from what is real. This, in fact, is much more accurate as a description of our world, as there is much that our senses cannot tell us, much that we must infer from what we can detect with our senses.
The second case is the classic 'Matrix' scenario, which of course can have numerable variations; but the key problem with this case, as illustrated in those films, is if this IS some illusion disguising a real world, then the possibility must exist to transcend the illusion of reality and sense the real world. And, once you do that, you're left once again with the same choices all over again. Anyone here seen
eXistenZ?
The third case - which is what lifegazer tries to postulate as 'Truth' - leaves us unable to learn anything from our sensations, whatsoever. We are then forced to either obey the illusion, or attempt to resist it; obviously, no one so far has been able to resist the illusion and survive. Further, if there is nothing we can learn through our senses, then there is nothing we can learn, period. Without sensations, we have nothing; even 'thought' and 'reason' become empty and meaningless if we have no sensory data, stored or otherwise, to work with. We see examples of this problem in almost every lifegazer thread, where he attempts to employ some sensed-phenomenon as support for his theories; which, of course, is an absurd course of action.
In any of the four cases, however, there is the practicality issue. Which of the four cases results in the greatest practical benefits? In any of the four, can we defy the observed laws of physics, sustain ourselves without observed food or water, etc? Apparently not. In every case, food, water, shelter, etc. are vital requirements. And in every case, obtaining these basic needs requires us to behave as if sensed-information is fairly accurate.
Unless Darren or other acosmists can demonstrate either the ability to transcend laws of physics, or survival without normal means of obtaining food, drink, shelter, etc... then their theories are irrelevant.
Back to his title thread - Do brains really exist?
Within our sensed reality, brains really exist. There is no means of detecting any other form of reality, so the answer, simply, is 'yes'.
Thank you.