Comments

  • Who Perceives What?
    That only I can imagine the music in my head. It's not 'an appearance' for anyone, not even me.

    'Phenomenon:1. a fact or situation that is observed to exist or happen, especially one whose cause or explanation is in question. "glaciers are interesting natural phenomena".'
    Wayfarer

    But the word is "Phenomenal":
    2.perceptible by the senses or through immediate experience.

    We have immediate experience of internal imaginings as much as we do the external world.

    Lets not get caught up in vocabulary. My claim is that thinking is the voluntary generation of immediate experience, and that this is the foundation of the sense of self. The blog post looks interesting and very relevant, I will read it when I have more time.
  • Who Perceives What?
    My eyes do not point inward so I am unable to verify what goes on behind them.NOS4A2

    I'm not asking about your eyes, but about your visual experiences.
  • Who Perceives What?
    No. Phenomena are 'what appears' - sensory input.Wayfarer

    Apart from internality and accuracy, what is qualitatively different about the song you hear and the song you play in your head?

    Phenomena' is a hugely overused word nowadays, because it's come to mean, basically, 'everything' - which makes it meaningless, as it doesn't differentiate anything.Wayfarer

    It means the appearance or experience of things, that which has a "what it is like". This applies to internal experiences as much as external.

    The stream of consciousness is just that, a stream of consciousness.Wayfarer

    Which of course says nothing at all.
  • Who Perceives What?
    I don't think of internal mentation as being phenomenal.Wayfarer

    No? I think of it as entirely phenomenal. When you visualize, or play a song in your head, is that not phenomenal?
  • Who Perceives What?
    I'm wondering why you speak in terms of "generating" phenomenal experience.Janus

    Well, first, I'm not at all certain what 'generating your own phenomenal experience' means. Do you mean, hallucinating?Wayfarer

    No, I mean thinking. When you think to yourself, "I'm having a nice day", you are generating the phenomenal experience of a voice in your head saying "I'm having a nice day". Or, you might think visually, and generate the visual phenomenal experience of you sitting outside in a sunny day.
  • Who Perceives What?
    They don’t have the predicament of selfhood.Wayfarer

    I'm not sure of this. Selfhood (in my perhaps idiosyncratic view) consists in the organism voluntarily generating its own phenomenal experience. This is thinking. When we think, we typically generate the phenomenal experience of a voice, or of images. This cleaves the phenomenal world in two: some phenomenal experience comes from the outside, some comes involuntarily from the inside (pains, emotions), some come from, and are initiated by, the inside. This latter duo, the initiator of its own internal experiences, coupled with those internal experiences themselves, is what we call the self.

    While animals do not speak, nothing stops them from generating their own phenomenal experiences, and thus having at least a rudimentary sense of self.
  • Who Perceives What?
    I cannot say I see them.NOS4A2

    Then what can you say you do with the visual components of your dreams? With the auditory components?
  • Who Perceives What?
    we are talking about the single act of looking at a tree
  • Who Perceives What?
    is any of what a neurology textbook describes about vision visually perceptable?
  • Who Perceives What?
    t’s direct because there is nothing between perceiver and perceived. The transformation and interpretation of “nervous activity” is indistinguishable from the perceiver and the act of perceiving, so is therefor not in between perceiver and perceived.NOS4A2

    There is absolutely something in between: all the neural machinery that, however it does, produces perception. This is readily distinguishable from the perceiver by it being imperceptible. You are not aware of the vast effort your brain undergoes to give you a nice clean visual representation.

    So your table is broken, split in two. On one half is the tree, on the other half is the perception of the tree, as experienced by the perceiver. Both halves are completely different in their properties. In between them lies a chasm of unconscious neural activity, which is neither the perceiver, as it is imperceptible, nor is it the perceived (obviously).
  • Who Perceives What?
    Yes. I am not denying seeing trees, I'm describing what seeing trees is.
  • External world: skepticism, non-skeptical realism, or idealism? Poll
    A recent thread has me wondering how far the community here differs from the general community of philosophers. It seems, from the noise, that there are more folk hereabouts who reject realism than in the wider philosophical community.Banno

    Who in that tread was rejecting realism?
  • Who Perceives What?
    you claim to doubt the reality of trees.Isaac

    Except I make no such claim. The tree is real, and the tree as represented experientially is not the "way the tree really is". It is likely a faithful mapping of real properties of the tree, but it is a mapping, not a "true representation". A "true representation" is a fiction, a contradiction.

    Our experiences of a tree stand in the same relation to a physical tree as the phrase "a tree" does. "A tree" maps faithfully to a tree, if there is one, but it is not a tree, and there is no "true phrase" among all the possible translations.
  • Who Perceives What?
    "hysterical"? "Pathologically certain"? Myself, I would ascribe these to the monomaniacal author of the 100s of posts long antivax crusade. But that's just me.

    Anyways I don't know why you think I have "trouble with trees". I have none.
  • Who Perceives What?
    We can also perceive it through other senses as well, including touching it.NOS4A2

    With touch, your body is directly interacting with the perceived object. But touch is not special. Like other senses, touch, via sensory receptors, must induce nervous activity. And then this nervous activity must be somehow transformed to, or interpreted as, experiential content. You know what it is like to touch an object by way of this experiential content.

    In what sense is this sequence "direct"? Certainly, a transformation or interpretation of nervous activity is not the same as the touched object.
  • Who Perceives What?
    It is apparently easy enough to be sure about world events that one can quite hysterically object to alternative interpretations of them, and yet strangely, they can never be sure they're really seeing the tree as it is.Isaac

    On the contrary, I'm quite certian I'm not "seeing the tree as it really is", as this is nonsensical, an oxymoron. To perceive is necessarily to translate the sensory information into experiential terms, which cannot somehow be coincident with "the tree itself".

    I'll try one more time to show how this is a mischaracterisation of realism.Banno
    I'm afraid this bears little relation to anything I've written.

    In particular, for you, "the tree has leaves" is not about the light reflected from the tree.Banno

    Great, I never said it was. My point, again, is that what is *directly* interacted with, by the body, (on one side of the table, in terms of the OP's metaphor), is something totally other than the tree: its imprint on light which has interacted with it. This is just one of the gaps I've described between perceiver and perceived which makes nonsense of the "direct" in direct realism.
  • Who Perceives What?
    The pretence is that our only choice is between a direct realism that does not recognise a causal chain involved in prception - a view that no one here actually holdsBanno

    Not just a casual chain, a series of fundamental transformations, between which there is nothing "direct".
  • Who Perceives What?
    It’s when people are explicitly and politely told that what they are attacking is a position that nobody holds, and they ignore the information completely.Jamal

    If I were attacking a position nobody holds no one would disagree with me.
  • Who Perceives What?
    I think it’s more that he is reacting to the equally incoherent claim that we don’t perceive things “as they (really) are”.Jamal

    Reacting to who's claim? His mental strawman he points at and shouts "Bad Argument! Stove's Gem!"
  • Who Perceives What?
    The idea that we perceive things "as they are' seems incoherent to me.Janus

    Exactly, it is incoherent.


    Naive realists like Banno don't seem to be able to let go of this primal picture.Janus

    And yet they strut and prance as if their naivete were in fact sharp insight. That is what is most objectionable.
  • Who Perceives What?
    is oddly passiveBanno

    Not at all, experience is actively constructed, it is not a passive process. It's the direct realist that believe experiences are passively received from the outside.
  • Who Perceives What?
    Do you think philosophy, in the sense that it is being "practiced" here is anything more than an amusing pastime?Janus



    Are we directly affected by the light reflected off of objects? What would it mean to say we are indirectly affected by light?Janus

    Our eyes are directly affected.

    The central claim of direct or naive realism is that we perceive things "as the are". Apples look red because that's really how apples look. This is called naive because I think we all start from there, we intuitively take this for granted as children. In some people this perspective is never abandoned, and they try to buttress this unchallenged intuition with philosophical arguments.

    Do you think philosophy, in the sense that it is being "practiced" here is anything more than an amusing pastime?Janus

    Not really.
  • Who Perceives What?
    Experientially considered perception seems direct, but scientific analysis of the organs of seeing show that it is a process. Does that mean it is indirect?Janus

    Yes.

    And further, what difference would it make as to what view one holds?Janus

    This is a question you can ask of all philosophy.
  • Who Perceives What?
    But we do not see the reflected light.Banno

    Then we do what with it?

    What is at stake is not vocabulary debates over how "see" shall or shall not be used, but rather how perception should be understood.

    Pray tell what is my fundamental misunderstanding?
  • Who Perceives What?
    nothing more significant than playing with words is going on here.Janus

    What is at stake is the nature of perception. Claims like

    For the direct realist, the man directly perceives a tree. X directly perceives Y.NOS4A2

    Are contradictory and fundamentally misunderstand perception.
  • Who Perceives What?
    Reflected light is what the eye directly interacts with, not the tree. Only in this sense do we "only see" the reflected light.
  • Who Perceives What?
    To see something *is* to experience it via its reflected light, so yes you see the tree. The argument is not that you don't see it, but that you see it via layers of indirection.
  • Who Perceives What?
    Rather, you do not *directly* see the tree. To see is to indirectly experience something visually.
  • Who Perceives What?
    There is no mitigating factor or intermediary between perceiver and perceived, therefor the perception is not indirect.NOS4A2

    When you see a tree, you are directly seeing not the tree but it's reflected light. That is one level of indirection.

    Your body might tumble around and bump into other objects. But, you are not your body. You are the part of your brain that is aware. If you fall into a vegetative coma, you are gone, even if the rest of your body is healthy. If your awareness survived your body's death, you would survive.

    This part of the brain that is aware has no direct access to the world. It can only interpret certain brain activity sensorily. These interpretations, experiences, are at a great remove from the objects that stimulate them.

    Which is not to say you only access these experiences. These experiences track real actions and properties of real objects, and so you are aware of objects, not merely experiences. But this awareness is at a remove from the objects, it is indirect.

    You cannot see the tree as it really is, this is a contraction. To see is to experience subjectively. Bats will see the tree differently than us, and aliens will see it differently than us and bats. There is no right answer among these different ways of seeing, they are all interpretations.
  • Who Perceives What?
    transformations you listed are transformations of the perceiver, not the perceived.NOS4A2

    Exactly right, the tree transforms the light that reflects off it, which transforms the chemical activity of the light receptors, which transforms electrical activity in the nervous system, which transforms subjective experience.

    What exactly about this process is "direct"?
  • Who Perceives What?


    It is reasonable to treat the mental act of categorization as part of the perception. It is also reasonable to distinguish it from the perception.
  • Who Perceives What?
    A major type of direct realism is distinguished by its claim that we perceive trees, not representations of trees—not that perception isn’t a transformative process.Jamal

    We perceive directly.
    Perception is a transformative process.

    How can these be consistent?
  • Who Perceives What?
    Direct realism is logically impossible. To perceive something means to translate it's sense data into a form that is apprehendable by an agent. This involves two transformations:

    1. The transformation from sensory media (light, sound waves, chemicals) into nerve signals.

    2: The transformation or interpretation of nerve signals into the abstract, fictive qualities of experience (colors, sounds, smells).

    This double transformation is the precondition of perception and rules out direct realism.

    To answer your question, you perceive the tree. But to perceive entails the above two transformations.
  • The case for scientific reductionism
    However, I believe this possibility is ruled out by the conditions that have defined the physical sciences from the beginning.Thomas Nagel, The Core of Mind and Cosmos

    Does this imply that an amended science could account for the mental? What could that amendment look like?
  • Why is the Hard Problem of Consciousness so hard?
    It seems that recently our willingness to grant consciousness to others has increased recently. I was surprised to see Sartre, the philosopher of subjectivity, declare animals to be machines, not even a century ago. And my feeling is that even children were not granted full consciousness status not long ago, in spite of the evidence of peoples own memories. Were women deemed to be conscious in 1860?

    Is this broadening of what is deemed conscious a reflection of a broader trend towards greater inclusivity? Is the perception of something as an insentient thing a necessary step towards abusing, exploiting, and killing it?
  • Why is the Hard Problem of Consciousness so hard?
    Precisely because we have no answer to the hard problem, we don't know definitely, we can only make educated guesses.
  • Why is the Hard Problem of Consciousness so hard?
    The hard problem seems inescapable. Even if you claim, "phenomenal consciousness is an illusion", the question remains, "why do some systems experience this illusion, and others do not?". People are experiencing something, and this must be explained.
  • Why is the Hard Problem of Consciousness so hard?
    Basically, because (2) is at least possible, there's no 'hard problem' of consciousness because neuroscience's failure to account for it in terms of one-to-one correspondence with physically instantiated objects may be simply because there is no such correspondence to be found.Isaac

    After what, 100 posts on this topic? You demonstrate you have no clue what the hard problem is.

    At least read this: https://iep.utm.edu/hard-problem-of-conciousness/#:~:text=The%20hard%20problem%20of%20consciousness%20is%20the%20problem%20of%20explaining,directly%20appear%20to%20the%20subject.

    In more detail, the challenge arises because it does not seem that the qualitative and subjective aspects of conscious experience—how consciousness “feels” and the fact that it is directly “for me”—fit into a physicalist ontology, one consisting of just the basic elements of physics plus structural, dynamical, and functional combinations of those basic elements. It appears that even a complete specification of a creature in physical terms leaves unanswered the question of whether or not the creature is conscious. And it seems that we can easily conceive of creatures just like us physically and functionally that nonetheless lack consciousness. This indicates that a physical explanation of consciousness is fundamentally incomplete: it leaves out what it is like to be the subject, for the subject. There seems to be an unbridgeable explanatory gap between the physical world and consciousness. All these factors make the hard problem hard.
  • Why is the Hard Problem of Consciousness so hard?
    It's entity all the way down and any action is just the movements and contortions of that entity.NOS4A2

    In other words, the activity of that entity.
  • Why is the Hard Problem of Consciousness so hard?
    As I gave the example of earlier, early scientists used to refer to 'ether' and each would know what the other meant. Their use of the word didn't create a necessity for science to explain what 'ether' was. It doesn't exist, there's no such thing.Isaac

    You can only say that because you have the advantage of the 20th century knowledge that the ether doesn't exist..

    In the 19th century there were very good reasons for believing in the ether, we would have too if we lived then (if we were lucky enough to be educated). You didn't get to just say, "hey guys, ether is just a felicitous word, that doesn't imply it exists." That's because no one was arguing from it's use in language. You had to actually demonstrate the ether doesn't exist, that the good reasons were not good enough, which is not a trivial thing.