Tag Archives: positronic brain

Laser Light Shining Bright

laser-lightLast Friday I ended the week with some ruminations about what (higher) consciousness looks like from the outside. I end this week — and this posting mini-marathon — with some rambling ruminations about how I think consciousness seems to work on the inside.

When I say “seems to work” I don’t have any functional explanation to offer. I mean that in a far more general sense (and, of course, it’s a complete wild-ass guess on my part). Mostly I want to expand on why a precise simulation of a physical system may not produce everything the physical system does.

For me, the obvious example is laser light.

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Does Not Compute

I’ve been on a post-a-day marathon for two weeks now, and I’m seeing this as the penultimate post (for now). Over the course of these, I’ve written a lot about various low-level aspects of computing, truth tables and system state, for instance. And I’ve weighed in on what I think consciousness amounts to.

How we view, interpret, or define, consciousness aside, a major point of debate involves whether machines can have the same “consciousness” properties we do. In particular, what is the role of subjective experience when it comes to us and to machines?

For me it boils down to a couple of key points.

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System Levels

Moving on from system states (and states of the system), today I’d like to fly over the landscape of different systems. In particular, systems that are — or are not — viewed as conscious.

Two views make this especially interesting. The first holds that everything is computing everything and — under computationalism — this includes conscious computations. The second (if I understand it) holds that anything that processes input data into some kind of output is conscious. (I’m not clear if the view also sees an input-output system as a computer.)

So I want to explore what I see as major landmarks in the landscape of systems that… well, about the only thing we can probably all agree on is that they do something.

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Model Minds

mind modelLast week we took a look at a simple computer software model of a human brain. (We discovered that it was big, requiring dozens of petabytes!) One goal of such models is replicating consciousness — a human mind. That can involve creating a (potentially superior) new mind or uploading an existing human mind (a very different goal).

Now that we’ve explored the basics of calculation, code (software), computers, and (computer software) models, we’re ready to explore what’s involved in attempting to model a (human) mind.

I’m dividing the possibilities into four basic levels.

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Cogito Ergo Sum

In my first post I mentioned René Descartes and his seminal statement, Cogito ergo sum.” I think, therefore I am. Because this statement and the ideas that spring from it lie at the heart of my philosophy and interests, it is a fitting topic for my second post. I also mentioned beginnings; these beginning posts explore such core topics as form my core and inform my mind.

And mind is the topic at hand. “I think, therefore I am,” concerns one of the most central, most personal, most mysterious, most fantastic aspects of our existence. It concerns something each of us shares every waking moment, but which remains–thus far–completely unknown.

That every moment mystery is that we think and we experience. Each of us has a voice inside their head; an «I» that is us. It’s the driver of the car that says, “I’m hungry,” or “I’m going to the library.”

It’s the sound track running in your head right now as you read this. It’s the basis of your thoughts and experience.

We have no idea what it actually is. Continue reading