That's it. You are reading something into my words that just isn't there. — Michael
When Michael says that colors are percepts or that we only ever see percepts and never colors, he is in a very real sense committing himself to the position that we only ever see colors indirectly. — Leontiskos
I don't have a copy of Searle, but according to this:
Searle presents the example of the color red: for an object to be red, it must be capable of causing subjective experiences of red. At the same time, a person with spectrum inversion might see this object as green, and so unless there is one objectively correct way of seeing (which is largely in doubt), then the object is also green in the sense that it is capable, in certain cases, of causing a perceiver to experience a green object.
This seems to be arguing that colours are mental phenomena and that the predicate "is red" is used to describe objects which cause red mental phenomena. — Michael
Newton: "For the Rays to speak properly are not coloured. In them there is nothing else than a certain Power and Disposition to stir up a Sensation of this or that Colour." — Michael
The topic is about perception, not grammar. — Michael
On colour, Quine has said this:
But color is cosmically secondary. Even slight differences in sensory mechanisms from species to species, Smart remarks, can make overwhelming differences in the grouping of things by color. Color is king in our innate quality space, but undistinguished in cosmic circles. Cosmically, colors would not qualify as kinds.
Your quote of him is him arguing for eliminative materialism, which I have previously accepted is a possibly correct account of so-called mental phenomena (e.g. pain just is a type of brain activity, and so colours just are a type of brain activity.
Indeed, Quine goes even further say that colours are “neither natural kinds nor any significance to theoretical science.” But if this is the case, why not eliminate this talk of mental percepts of colour, this is not what science is investigating.
— Michael
Russell is not saying what (I think) you think he's saying. When he says "the sensation that we have when we see a patch of colour simply is that patch of colour" he is saying that colour just is that sensation. — Michael
I don't care about how Wittgenstein viewed perception and colours. He was not a physicist or a neuroscientist and so he didn't have the appropriate expertise. To think that somehow an examination of language can address such issues is laughable. Do you want to do away with the Large Hadron Collider and simply talk our way into determining how the world works? — Michael
Notice no mental percepts needed
— Richard B
Of course they are, else you wouldn't be seeing anything; you'd just have light reaching your eyes and then nothing happening, e.g. blindness or blindsight. — Michael
But not only a percept.
Where are these percepts to be found? — Banno
Claiming that they do not "really" have these colours is a misunderstanding of the nature of colour.
— Banno
No, claiming that they really have these colours is a misunderstanding of the nature of colour. — Michael
Pragmatism instead is a positive alternative in being based on a willingness to believe - and then test. Belief becomes an inveterate habit if it keeps passing the test. And that same evolutionary credo explains reality as a whole. — apokrisis
No, that is our disagreement. We agree we perceive the pen as red. Maybe you think the pen is actually red, but I don't.
— Hanover
Ok. So for Hanover, "the pen is red" is not true. I think it is. — Banno
I believe in a God who is Omnipresent, Omniscient, and Just (by Just I mean It delivers Good and Evil in the right proportion). Therefore, I think that life is Just. — MoK
The "common-sense" naive view falsely posits that colours-as-we-experience-them are mind-independent properties of objects, but the science shows us that they are not; they are mental percepts related to neural activity in the visual cortex. — Michael
don't think the OP, for example, is asking if atoms reflecting light is mind-independent. He's referring to the mental percept and asking if it's a mental percept or (as the naive colour primitivist believes) something mind-independent. — Michael
We can use the adjective “red” to describe a mind-independent pen that has properties that are the cause of red colour percepts. But the noun “red” refers to that colour percept, not a mind-independent property of the pen. — Michael
As such there is no (visible) light to stimulate the rods and cones in our eyes, and so the V4 neurons are not fired, and so no colour percepts are produced.
It’s certainly not the case that black is some mind-independent property of objects that is seen by the absence of (visible) light. That just makes no sense at all. — Michael
Disdain for scientific metaphysics: talk about material substance, naturalism or physicalism, as if these were primordial concepts. — Constance
I haven't said that mental phenomena aren't just particular brain states. I'm not necessarily arguing for any kind of dualism. I'm leaving that open. Maybe pain just is the firing of C-fibers, as Churchland argues. Maybe colours just are the firing of V4 neurons.
Regardless of what mental phenomena are, pain and colours are mental phenomena; they are not mind-independent properties of fire. — Michael
One's sees the same in Quine: "there’s mystery at the bottom of every question ultimately." When the priority is science and clarity at the level of basic questions, one finds Quine's indeterminacy staring back at you, and there is the abiding Kantian making way for faith through a kind of apophatic method of seeing where thought has its limitations. I have always had contempt for this kind of thinking, and I don't think Wittgenstein is right to dismiss ethics and value from meaningful philosophy, which I think addresses your thoughts. Analytic philosophers, at least in Quine's time, really did have that "What indeed has Athens to do with Jerusalem" style of Fideism, and Witt has been said to be just like this. — Constance
Yes. Mental phenomena are either reducible to brain activity or are caused by brain activity. We dream/hallucinate/see (in colour) when the visual cortex is active. — Michael
Again, this is the only way to make sense of dreams, hallucinations, synesthesia, and differences in colour perception – all of which are real. — Michael
"Family resemblances" is not an "idea" or "theory" that can be proved wrong. It's a vague metaphor that one could call "true" so long as there are any shared similarities between whatever one considers to be a "language-game," (which is also a term that is left vague). — Count Timothy von Icarus
I am saying "this level of vagueness is no longer necessary or helpful; there now exist ways to describe similarities in languages, animal communication, and codes with much more rigor—to actually say something beyond the trivial and banal." — Count Timothy von Icarus
*And I should note that plenty of Wittgensteinians make admirable attempts to dispell the vagueness, even at the risk of theories that sound wildly counterintuitive and implausible. It is only a certain type that seems to really thrive on the vagueness and the ability to avoid error by never really saying anything of substance. — Count Timothy von Icarus
One has to understand ethics as Wittgenstein did in the Tractatus. See also the Lecture on Ethics and his Culture and Value. Apparently this is hard to see, as is made clear by all of the Wittgenstein fans at this forum, who entirely fail to understand this basic point: ethics and value are transcendental. See what he says: — Constance
You can see why Witt's positivist friends could never understand what he was talking about. He was a deeply religious philosopher as he realized that this dimension of value in our existence is utterly transcendental and yet permeated our existence. It is not about an afterlife, or some divine plan or punishment. It is there IN the fabric of what we are. — Constance
Re PI 65, I think this has simply been proven wrong by advances in linguistics and information theory. We can identify similarities. I find it hard to even imagine Wittgenstein wanting to argue this point in the modern context given his respect for the sciences. — Count Timothy von Icarus
The supposition is not really specific enough to sensibly answer the question. We have to make decisions step by step, acknowledging mis-steps as we discover them — Ludwig V
One need not take as one's target so radical a form of the thesis to show that cognitive relativism is unacceptable, however. This can be demonstrated as follows. Suppose that cognitive relativism is the case. How then do we recognize another form of life as another form of life? The ability to detect that something is a form of life and that it differs from our own surely demands that there be a means for us to identify its presence and to specify what distinguishes it from ours. But such means are unavailable if the other form of life is impenetrable to us, that is, if it is closed against our attempts to interpret it enough to say that it is a form of life. This means that if we are to talk of other forms of life at all we must be able to recognize them as such; we must be able to recognize the existence of behaviour and patterns of practices which go to make up a form of life in which there is agreement among the participants by reference to which their practices can go on. Moreover, if we are to see that the form of life is different from our own we have to be able to recognize the differences; this is possible only if we can interpret enough of the other form of life to make those differences apparent. And therefore there has to be sufficient common ground between the two forms of life to permit such interpretation.
And yet this thesis seems entirely implausible. For instance, I have never heard of a culture who does arithmetic completely different from any other culture. Where is the arithmetic that is untranslatable? — Count Timothy von Icarus
And aside from that, it seems to leave the door open on an all encompassing skepticism, for on this account how can anyone be sure that they truly share a form of life with anyone else? — Count Timothy von Icarus
But to my mind this capability doesn't jive well with the concept of entirely disparate, sui generis forms of reason (e.g., that Chinese reason is entirely different from French reason). — Count Timothy von Icarus
'm not sure how the vague metaphor here is supposed to address the point TBH.
But funny enough this is a point of contention in Wittgensteinian circles precisely because he uses a lot of vague metaphors. — Count Timothy von Icarus
A similar thing that crops up in these relativistic accounts is a sort of cognitive relativism. I'll let A.C. Grayling describe this one:
Cognitive relativism is a troubling thesis. Consider the point that it makes the concepts of truth, reality, and value a matter of what sharers in a form of life happen to make of them at a particular time and place, with other forms of life at other times and places giving rise to different, perhaps utterly different or even contrary, conceptions of them. In effect this means that the concepts in question are not concepts of truth and the rest, as we usually wish to understand them, but concepts of opinion and belief. We are, if cognitive relativism is true (but what does true now mean?), in error if we think that truth and knowledge have the meanings we standardly attach to them, for there is only relative truth, there is only reality as we, in this conceptual community at this period in its history, conceive it. — Count Timothy von Icarus
One of those possibly pseudo-questions which may be sophistry; but, in your opinion do you think physics describes logic? — Shawn
If there is no mind to experience and conceptually designate “red” does red ever aquire an inherent existence independent of a third party mind? — Mp202020