moving finger said:
Is that “No, I do not believe that your subjective experience of the colour yellow is necessarily identical to my subjective experience of the colour yellow”?
Tournesol said:
Thank you. We agree on this.
moving finger said:
So now you are saying "the experience of the colour yellow" and the "subjective feel of yellow (the yellow-quale)" are in fact the same thing?
Tournesol said:
Thank you. We also agree on this.
moving finger said:
OK. You claimed that “the experience of the colour yellow” and “the subjective 'feel' of yellow, the yellow-quale” were different. Can you explain how you think they are different?
Tournesol said:
See post #29, first 3 lines. (but I don’t want to make a fuss)
moving finger said:
Firstly, you (as a 3rd person objective observer) would never be able to find subjective experience by examining an NP state from the outside. The only route to “finding subjective experience” (as you put it) is through the manifestation of an NP state within a consciousness – ie 1st person subjectively.
Tournesol said:
Again, your use of an "NP state" as somehow embracing subjectivity is confusing.
IMHO perhaps your confusion is caused by the insistence on clinging to the intuition that everything (including subjective experience) must be interpretable (explainable) from a 3rd person objective perspective.
Tournesol said:
Intuition is a wonderful but dangerous thing.
moving finger said:
I did not say that the NP of “A having a green quale” does not differ from that of “B having a red quale”; but it does not follow that different NPs must necessarily result in completely different behaviour. Dissimilar NPs may cause dissimilar behaviour, but there can conceivably be similarities in behaviour resulting from dissimilar NPs.
Tournesol said:
If qualia are causes, they will always be detectable in principle; that was the issue the original question was getting at. You seem to have fallen back on the position that they might not be detectable in practice.
IMHO, qualia are 1st person subjective experiences (which it seems you now agree with, as per the 2nd exchange above). As such, they can be causes (affecting our behaviour). But as 1st person subjective experiences, they are NOT amenable to study by 3rd person objective science, and therefore they are IN PRINCIPLE not “detectable” by 3rd person objective science.
Tournesol said:
The consciousness is separate from the NP state ?
Look at an NP state from the outside (3rd person objective science) and you see one thing. Look at an NP state from the inside (1st person subjective experience, aka a part of consciousness) and you see another.
One cannot understand the difference by clinging to the intuition that everything (including subjective experience) must be interpretable (explainable) from a 3rd person objective perspective.
moving finger said:
If you mean simply “if someone sees my green as his red and my red as his green” then I would say the question is meaningless, because the experience of that person seeing green is unique to that person and does not necessarily bear any resemblance or connection to your experience of you seeing either red or green.
Tournesol said:
The idea that experiences could be so loosely related to physical brain-states implies a dualism which you elsewhere reject.
Loosely connected?
Look at an NP state from the outside (3rd person objective science) and you see one thing. Look at an NP state from the inside (1st person subjective experience, aka a part of consciousness) and you see another.
Call this “dualism” if you wish, but one cannot understand the difference between “experiences” and “observing brain states” by clinging to the intuition that everything (including subjective experience) must be interpretable (explainable) from a 3rd person objective perspective.
moving finger said:
Just to be clear, what you seem to want is that “two brains can be exactly the same, but not be exactly the same, at the same time”, a clear contradiction.
Tournesol said:
I think he supposes that it is logically conceivable that two brains could be physically in the same state, but experientially in different states. And it is logically conceivable, but, like flying pigs, naturalistically impossible.
I do not consider it even “logically conceivable”.
moving finger said:
I challenge that no two people can have the “exact same physical brain”. The exact composition and pattern of each physical brain is determined not only by genetic history but also by total life experience.
Tournesol said:
Two people in a thought-experiment can. You are addressing naturalistic possibility, not logical conceivability.
Nope. For two people to have “exactly the same physical brain” they would in fact have to be exactly the the same person. I do not accept that two different people could share the “exact same physical brain”, even in principle.
moving finger said:
No two people have the same total life experience, hence there is no reason to expect that any two brains are “exactly the same”.
Secondly, the mere fact that one experiences red where the other experiences green is direct evidence that the two brains are not exactly the same.
Tournesol said:
Naturalistically, yes. Logically ?
Logically also. How can two brains be logically “exactly the same” if one brain interprets a visual scene as “red” and the other interprets the same scene as “green”?
moving finger said:
Why on Earth do you say that? My experience of me seeing my daughter about to walk across the road in front of an oncoming car would have a VERY immediate physical effect on me!
What evidence do you have that experience does NOT have a physical effect?
Tournesol said:
If it is logically possible for conscious states to vary across identical brains, then it follows that they make no physical difference. Logically.
Naturalistically, this isn't very plausible.
Identical brains, as I have said, is (IMHO) a non-starter in principle.
Even if we allow identical (truly identical) brains, that (to my mind) also implies identical conscious experiences.
moving finger said:
That is because experience is a 1st person subjective phenomenon, whereas “to make it clear to others” you must necessarily translate it into a 3rd person objective description, and the 3rd person objective description can never convey everything about the 1st person objective experience. This is the reason why “Mary can never know all there is to know about the experience of seeing red” if she has never HAD the experience of seeing red, and also why it is meaningless to ask “what is it like to be a bat?”, because the only agent who CAN know what it is like to be a bat …… is a bat!
But NONE of the above is evidence that experience does not have a physical effect.
Tournesol said:
But it is very plausible that everyhting in phsyics, as a matter of principle can be explained in 3rd-person language.
Everything contained within 3rd person objective physics can be explained in 3rd-person language. But 1st person subjective experiences are not accessible to 3rd person objective science (how many times have I typed this?). 1st person subjective and 3rd-person objective provide two different perspectives on the world which cannot be totally reconciled with each other. What more needs to be explained?
Tournesol said:
So the very existence of anything that is intriniscally 1st-person suggests that there is somehtign non-physical.
Nope. It suggests there is something that is not accessible to 3rd person objective science, and that something is 1st person subjective experience. But 1st person subjective experience is nevertheless physical. 1st person subjective and 3rd-person objective provide two different perspectives on the world which cannot be totally reconciled with each other. What more needs to be explained?
Tournesol said:
Couple that the cuasal closure of the physical , and you get the causal idleness of the experiential.
1st person subjective experiences are physical. But they are not amenable to study using 3rd-person objective science. Thers is no causal idleness, whatever that might be.
Tournesol said:
It is for you to explain how your commitment to physicalism squares with your commitment to irreducibly 1st-person experience.
1st person subjective experiences are physical. But 1st person subjective experiences are not amenable to study using 3rd-person objective science. 1st person subjective and 3rd-person objective provide two different perspectives on the world which cannot be totally reconciled with each other. What more needs to be explained?
moving finger said:
AND they cause us to take certain actions – therefore they are very much part of our decision making and cause-and-effect.
Tournesol said:
That (call it I) stands up by itself, but how does it square with II physicalism
III the principle that everyhting physical can be expressed in a 3rd-person way ?
I & II = 1st person subjective experiences are physical. But they are not amenable to study using 3rd-person objective science.
III = Where is it written that “everything” can be expressed in a 3rd-person way?
moving finger said:
What paradox? I see no paradox. Can you explain where the paradox is?
Tournesol said:
Between "consciousness doesn't cause anything" (epiphenomenalism) and "I am talking about consciousness".
But consciousness IS physical, it DOES cause, and I can talk about it, and talk about it causing. Where is there a paradox?
moving finger said:
Because eperience is PART OF the physical world! I’m sorry, but its so blindingly obvious. There IS no dualism, there IS no separate “thinking self” which somehow exists out of causal contact with the physical self. This is a philosophical dead-end.
Tournesol said:
For you there is a dualism of 1st-person-understandable and 3rd-peson describable.
If one looks hard enough one can find “examples” of so-called “dualism” everywhere – but there is a world of difference between this emergent observed dualism and the intrinsic but wholly intuitive “physical/spiritual” Dualism (with an upper-case D) that Libertarians espouse and finds its roots in Descartes ideas, postulating that there is some intrinsic yet unexplained “non-physical something” which allegedly causes and controls our consciousness and which also somehow “controls itself” independently of the physical world, and yet still mystically interacts (when it wishes to) with the physical world.
I submit that the Libertarian/Descartes idea of Dualism is in fact an illusion arising from the refusal to give up the intuition that “everything in the world, , including subjective experiences, must be explainable from a 3rd person objective perspective”. This intuition (IMHO) is false.
Unlike Libertarian/Descartes Dualism, The “dualism” that you refer to above in the form of 1st person subjective experience versus 3rd-person objective science is not an intrinsic dualism “of” the world, it is simply an emergent dualism “in” the world caused by looking at the world from two irreconcilable perspectives (one perspective from inside consciousness, one perspective from outside consciousness). This is fully understandable and explainable, but it is certainly NOT the Dualism of Descartes or Libertarianism.
The dualism provided by the different perspectives of 1st person subjective and 3rd-person objective emerge (if you like) as a kind of “epistemic dualism”. It recognises that there are fundamental, in principle, limits to our knowledge which depend on our chosen perspective. With due respect to Nagel, I can never know what it is like to be a bat, for example, and Mary can never know what it is like to experience the sight of red until she actually does experience red, but there is no physical/spiritual Dualism in the sense that parts of the “non-physical essence of a bat” exists in some kind of objective but “causal limbo” separate from the rest of the deterministic and physical universe.
MF
