expect this to be a paper soon, or a part thereof?

[alexr_rwx]

SEARLE: 1. Programs are entirely syntactical. 2. Minds have semantics. 3. Syntax is not the same as, nor by itself sufficient for, semantics. Therefore, programs are not minds. QED. [from The Mystery of Consciousness, pg 11, paraphrase of his well-known "Chinese Room Argument"]

RUDNICK: In principle, given a powerful enough computer and a sufficient model of physics, I could simulate with arbitrary precision all of the happenings in a section of space -- assuming that this space does not contain the computer running the simulation. Now I choose to simulate a room containing a human, sitting in a chair. The simulated human in the simulated chair will, for all useful definitions of "conscious", be conscious (although will not necessarily realize that he's part of a simulation). The brain-in-a-vat problem needs neither a brain nor a vat, just a mathematical model of a brain. If you want to say that the program is not a mind but contains one, that's analogous to saying that the physical world is not a mind but contains one. The main point is that if we believe the physical world to be mathematically modelable, we can bring about awake minds within a computer.

Furthermore, "semantics" is an inherently shady word, loaded with connotations of some "objectively extant physical world" that one can reference. You Professor Searle, know just as well as I that you can't get outside of your own head -- eyes don't guarantee that you're seeing anything more real than what a robot with a video camera or an agent with a get_world_input() function gets.

Comments

[smileydee.livejournal.com]

Well, if we're assuming that our brains are just receiving and responding to input, then how are we to know that the other region is sending us a signal that feels like understanding? Wouldn't we just receive it as some other nameless input? How would be able to differentiate that from some nameless input telling us we don't know what the hell we're talking about?

[zip4096.livejournal.com]

Hmm, this is tough! :)

Well... I'm a little uncomfortable defending my "understanding" signaling idea, because it's just that, an idea, and I don't know of a physical basis for it that's been discovered (I'm all about empirical evidence and science; philosophy often seems like a bunch of bullshit to me).

But anyway, let me give you an example... Regions in the brain communicate with one another all the time. Say you see something very scary- well the optic nerve carries the raw image to a large region of cortex (visual processing takes a lot of power!) in the occipital lobe which interprets the image as being scary, and then a signal is sent to your amygdala, which makes you feel afraid, and that has wiring to the hippocampus, which will make you remember it (and even better than normal because there's a strong emotion associated with it).

What I'm talking about is communication within the brain.. It's not input from the outside... does that answer your question at all... ?

I'm sorry, I actually had to reread your post a few times and I'm still not entirely sure if I understand what you were getting at. If it gets too abstract I have difficulty, but I love the physical, real science stuff :)

[smileydee.livejournal.com]

Well, my point is, that if we parse all these signals from the brain down, they're still, at the core, electrical impulses, right? Like 1s and 0s. So we're still back to the main problem of how do we translate 1s and 0s into something that makes sense? How does that become consciousness? No matter how complex our brains are, we're still back to the chinese room. When does self-awareness and intelligence come in?

[oniugnip.livejournal.com]

That, m'dear, is the big problem. Where's the subjective, conscious experience, and how does it come about out of a physical system?

Hofstadter says (and I'm inclined to believe, and he puts it much more eloquently) that it comes about from a sufficiently self-referential computational system, which is to say a thing that has a model of itself and does processing about its own state...