MugaSofer comments on By Which It May Be Judged - Less Wrong

35 Post author: Eliezer_Yudkowsky 10 December 2012 04:26AM

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Comment author: Decius 20 December 2012 12:59:31AM 0 points [-]

Complicated isn't a bad thing;

If the fairy is observable despite being in principle not observable... I break.

If it is in principle possible to experience differently from what a quantum scan of the brain and body would indicate, but behave in accordance with physicalism ... how would you know if what you experienced was different from what you thought you experienced, or if what you thought was different from what you honestly claimed that you thought?

That would seem to be close to several types of abnormal brain function, where a person describes themself as not in control of their body. I think those cases are better explained by abnormal internal brain communication, but further direct evidence may show that the 'reasoning' and 'acting' portions of some person are connected similarly enough to normal brains that they should be working the same way, but aren't. If there is a demonstrated case either of a pattern of neurons firing corresponding to similar behavior in all typical brains and a different behavior in a class of brains of people with such abnormal functioning (or in physically similar neurons firing differently under similar stimuli), then I would accept that as evidence that the fairy perceived by those people existed.

Comment author: MugaSofer 20 December 2012 07:46:56PM 0 points [-]

Complicated isn't a bad thing;

Well, it's proving hard to explain.

If the fairy is observable despite being in principle not observable... I break.

It's observable. The cats are epiphenomenal, and thus unobservable, except to themselves.

If it is in principle possible to experience differently from what a quantum scan of the brain and body would indicate, but behave in accordance with physicalism ... how would you know if what you experienced was different from what you thought you experienced, or if what you thought was different from what you honestly claimed that you thought?

Pardon?

That would seem to be close to several types of abnormal brain function, where a person describes themself as not in control of their body. I think those cases are better explained by abnormal internal brain communication, but further direct evidence may show that the 'reasoning' and 'acting' portions of some person are connected similarly enough to normal brains that they should be working the same way, but aren't. If there is a demonstrated case either of a pattern of neurons firing corresponding to similar behavior in all typical brains and a different behavior in a class of brains of people with such abnormal functioning (or in physically similar neurons firing differently under similar stimuli), then I would accept that as evidence that the fairy perceived by those people existed.

Well, if they can tell you what the problem is then they clearly have some control. More to the point, it is a known feature of the environment that all observed cats are actually illusions produced by fairies. It is a fact, although not generally known, that there are also epiphenomenal (although acted upon by the environment) cats; these exist in exactly the same space as the illusions and act exactly the same way. If you are a human, this is all fine and dandy, if bizarre. But if you are a sentient cat (roll with it) then you have evidence of the epiphenomenal cats, even though this evidence is inherently subjective (since presumably the illusions are also seemingly sentient, in this case.)

Comment author: Decius 21 December 2012 12:06:44AM 0 points [-]

If it is in principle possible to experience differently from what a quantum scan of the brain and body would indicate, but behave in accordance with physicalism ... how would you know if what you experienced was different from what you thought you experienced, or if what you thought was different from what you honestly claimed that you thought?

Pardon?

How could you tell if you were experiencing something differently from the way a p-zombie would (or, if you are a p-zombie, if you were experiencing something differently from the way a human would)?

But if you are a sentient cat (roll with it) then you have evidence of the epiphenomenal cats, even though this evidence is inherently subjective (since presumably the illusions are also seemingly sentient, in this case.)

In every meaningful way, the cat fairy is a cat. There is no way for an epiphenomenal sentient cat to differentiate itself from a cat fairy, nor any way for a cat fairy to differentiate itself from whatever portions of 'cats' it controls (without violating the constraints on cat fairy behavior). Of course, there's also the conceivability of epiphenomenal sentient ghosts which cannot have any effect on the world but still observe. (That's one of my death nightmares—remaining fully perceptive and cognitive but unable to act in any way.)

Comment author: Eugine_Nier 21 December 2012 03:48:44AM 1 point [-]

How could you tell if you were experiencing something differently from the way a p-zombie would (or, if you are a p-zombie, if you were experiencing something differently from the way a human would)?

I am experiencing something, therefore I am not a p-zombie.

Comment author: Decius 21 December 2012 06:01:07AM 0 points [-]

Consider the possibility that you are not experiencing everything that humans do. Can you provide any evidence, even to yourself, that you are? Could a p-zombie provide that same evidence?

Comment author: Eugine_Nier 22 December 2012 07:42:13AM 1 point [-]

Consider the possibility that you are not experiencing everything that humans do.

How is this relevant? My point is that I'm experiencing what I'm experiencing.

Comment author: Decius 22 December 2012 07:57:12AM 3 points [-]

I'm experiencing what I'm experiencing.

And p-zombies are experiencing what they're experiencing. You can't use a similarity to distinguish.

Comment author: nshepperd 22 December 2012 09:34:13AM 3 points [-]

P-zombies aren't experiencing anything. By definition.

Comment author: Kawoomba 22 December 2012 09:46:34AM 2 points [-]

Those two statements are both tautologically true and do not contradict one another.

Comment author: Decius 22 December 2012 03:38:03PM 0 points [-]

What would be different, to you, if you weren't experiencing anything, but were physically identical?

Comment author: Eugine_Nier 23 December 2012 01:44:46AM 3 points [-]

I wouldn't be experiencing anything.

Comment author: nshepperd 22 December 2012 09:45:11PM 1 point [-]

Are you asking what I would experience? Because I wouldn't. Not to mention that such a thing can't happen if, as I expect, subjective experience arises from physics.

Comment author: Osuniev 23 December 2012 02:36:59AM *  0 points [-]

"How is this relevant?"

It is relevant because i you cannot find any experimental differences betweenn you and a you NOT experiencing, then maybe there is no such difference.

Comment author: Eugine_Nier 24 December 2012 06:02:30AM 1 point [-]

i you cannot find any experimental differences betweenn you and a you NOT experiencing

I cannot present you with evidence that I am experiencing, except maybe by analogy with yourself. I, however, know that I experience because I experience it.

Comment author: nshepperd 21 December 2012 08:35:50AM 1 point [-]

You seem to be somewhat confused about the notion of a p-zombie. A p-zombie is something physically identical to a human, but without consciousness. A p-zombie does not experience anything in any way at all. P-zombies are probably self-contradictory.

Comment author: MugaSofer 21 December 2012 08:26:32AM 0 points [-]

How could you tell if you were experiencing something differently from the way a p-zombie would (or, if you are a p-zombie, if you were experiencing something differently from the way a human would)?

Because p-zombies aren't conscious. By definition.

In every meaningful way, the cat fairy is a cat. There is no way for an epiphenomenal sentient cat to differentiate itself from a cat fairy, nor any way for a cat fairy to differentiate itself from whatever portions of 'cats' it controls (without violating the constraints on cat fairy behavior). Of course, there's also the conceivability of epiphenomenal sentient ghosts which cannot have any effect on the world but still observe. (That's one of my death nightmares—remaining fully perceptive and cognitive but unable to act in any way.)

Well, the cat does have an associated cat fairy. So, since the only cat fairy who's e-cat it could observe (its own) has one, I think it should rightly conclude that all cat fairies have cats. But yes, epiphenomenal sentient "ghosts" are possible, and indeed the p-zombie hypothesis requires that the regular humans are in fact such ghosts. They just don't notice. Yes, there are people arguing this is true in the real world, although not all of them have worked out the implications.

Comment author: Decius 21 December 2012 04:37:22PM 0 points [-]

What would be the subjective difference to you if you weren't 'conscious'?

Comment author: [deleted] 21 December 2012 04:40:58PM 1 point [-]

To have a subjective anything, you have to be conscious. By definition, if you consider whether you're a P-zombie, you're conscious and hence not one.

Comment author: Decius 22 December 2012 02:50:08AM 0 points [-]

Now conceive of something which is similar to consciousness, but distinct; like consciousness, it has no physical effects on the world, and like consciousness, anyone who has it experiences it in a manner distinct from their physicality. Call this 'magic', and people who posses it 'magi'.

What aspect does magic lack that consciousness has, such that a p-zombie cannot consider if it is conscious, but a human can ask if they are a magi?

Comment author: MugaSofer 22 December 2012 05:08:59PM 1 point [-]

Who said consciousness has no effects on the physical world? Apart from those idiots making the p-zombie argument that is. Pretty much everyone here thinks that's nonsense, including me and, statistically, probably srn347 (although you never know, I guess.)

Regarding your Magi, if it affects their brain, it's not epiphenomenal. So there's that.

Comment author: Decius 22 December 2012 09:44:32PM 0 points [-]

The point I am trying to make is that P-zombies are nonsensical. I'm demonstrating that they are equally sensible as an absurd thing.

Comment author: MugaSofer 23 December 2012 02:20:31PM -1 points [-]

And the point I am trying to make is that p-zombies are not only a coherent idea, but compatible with human-standard brains as generally modelled on LW. That they don't in any way demonstrate the point they were intended to make is quite another thing.