Tag Archives: Soul

News

Can computers become conscious by increasing processing power?

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There is a very famous thought experiment from UC Berkeley philosopher John Searle that all Christian apologists should know about. And now everyone who reads the Wall Street Journal knows about it, because of this article. (H/T Sarah)

Searle is writing about the IBM computer that was programmed to play Jeopardy. His Chinese room example shows why no one should be concerned about computers acting like humans. There is no thinking computer. There never will be a thinking computer. And you cannot build up to a thinking computer my adding more hardware and software.

Excerpt:

Imagine that a person—me, for example—knows no Chinese and is locked in a room with boxes full of Chinese symbols and an instruction book written in English for manipulating the symbols. Unknown to me, the boxes are called “the database” and the instruction book is called “the program.” I am called “the computer.”

People outside the room pass in bunches of Chinese symbols that, unknown to me, are questions. I look up in the instruction book what I am supposed to do and I give back answers in Chinese symbols.

Suppose I get so good at shuffling the symbols and passing out the answers that my answers are indistinguishable from a native Chinese speaker’s. I give every indication of understanding the language despite the fact that I actually don’t understand a word of Chinese.

And if I do not, neither does any digital computer, because no computer, qua computer, has anything I do not have. It has stocks of symbols, rules for manipulating symbols, a system that allows it to rapidly transition from zeros to ones, and the ability to process inputs and outputs. That is it. There is nothing else.

By the way, Searle is a naturalist – not a theist, not a Christian. But he does oppose postmodernism. So he isn’t all bad. But let’s hear from a Christian scholar who can make more sense of this for us.

UPDATE: Drew sent me a link to the full article by Searle.

Here’s an article by Christian philosopher Jay Richards.

Excerpt:

Popular discussions of AI often suggest that if you keep increasing weak AI, at some point, you’ll get strong AI. That is, if you get enough computation, you’ll eventually get consciousness.

The reasoning goes something like this: There will be a moment at which a computer will be indistinguishable from a human intelligent agent in a blind test. At that point, we will have intelligent, conscious machines.

This does not follow. A computer may pass the Turing test, but that doesn’t mean that it will actually be a self-conscious, free agent.

The point seems obvious, but we can easily be beguiled by the way we speak of computers: We talk about computers learning, making mistakes, becoming more intelligent, and so forth. We need to remember that we are speaking metaphorically.

We can also be led astray by unexamined metaphysical assumptions. If we’re just computers made of meat, and we happened to become conscious at some point, what’s to stop computers from doing the same? That makes sense if you accept the premise—as many AI researchers do. If you don’t accept the premise, though, you don’t have to accept the conclusion.

In fact, there’s no good reason to assume that consciousness and agency emerge by accident at some threshold of speed and computational power in computers. We know by introspection that we are conscious, free beings—though we really don’t know how this works. So we naturally attribute consciousness to other humans. We also know generally what’s going on inside a computer, since we build them, and it has nothing to do with consciousness. It’s quite likely that consciousness is qualitatively different from the type of computation that we have developed in computers (as the “Chinese Room” argument, by philosopher John Searle, seems to show). Remember that, and you’ll suffer less anxiety as computers become more powerful.

Even if computer technology provides accelerating returns for the foreseeable future, it doesn’t follow that we’ll be replacing ourselves anytime soon. AI enthusiasts often make highly simplistic assumptions about human nature and biology. Rather than marveling at the ways in which computation illuminates our understanding of the microscopic biological world, many treat biological systems as nothing but clunky, soon-to-be-obsolete conglomerations of hardware and software. Fanciful speculations about uploading ourselves onto the Internet and transcending our biology rest on these simplistic assumptions. This is a common philosophical blind spot in the AI community, but it’s not a danger of AI research itself, which primarily involves programming and computers.

AI researchers often mix topics from different disciplines—biology, physics, computer science, robotics—and this causes critics to do the same. For instance, many critics worry that AI research leads inevitably to tampering with human nature. But different types of research raise different concerns. There are serious ethical questions when we’re dealing with human cloning and research that destroys human embryos. But AI research in itself does not raise these concerns. It normally involves computers, machines, and programming. While all technology raises ethical issues, we should be less worried about AI research—which has many benign applications—than research that treats human life as a means rather than an end.

Jay Richards is my all-round favorite Christian scholar. He has the Ph.D in philosophy from Princeton.

When I am playing a game on the computer, I know exactly why what I am doing is fun – I am conscious of it. But the computer has no idea what I am doing. It is just matter in motion, acting on it’s programming and the inputs I supply to it. And that’s all computers will ever do. Trust me, this is my field. I have the BS and MS in computer science, and I have studied this area. AI has applications for machine learning and search problems, but consciousness is not on the radar. You can’t get there from here.

News

J.W. Wartick explains why Christians should not embrace a materialist conception of humanity

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From the blog Always Have a Reason, a case against the idea that Christians can embrace a materialist conception of humanity.

Problem 1: a concept of the self that persists through the passage of time:

He writes:

How do we maintain identity through time? Here, the problem must be answered by all materialists, not just Christian materialists.

The problem is, of course, that our bodies don’t maintain physical identity. We are continually replacing the physical parts of our body over time. Now, I am hesitant to make the oft-repeated claim that our entire bodies are replaced every so many years, as I have been unable to find any research confirming it. However, it simply is the case that large portions of our body are replaced. Given this fact, how do we maintain identity? What is it that keeps us the same person over time?

Another major problem is this: to which part of our body are we identical? Or, to put it another way, which parts of our body do we need to keep in order to be the same person? Here we can appeal to a thought experiment. A mad scientist has us captured and he wants to see how long we can maintain identity. Slowly, he replaces each part of our body with a new one with the exact same DNA, structure, etc. As he replaces these parts, he discards the old ones and destroys them. He starts with the legs. Then he moves to the midsection, replacing one organ at a time. Then the heart, the arms,  the ears, the eyes. When he gets  to the brain, he goes through and replaces only single neurons at a time.

The question is pretty obvious: When do we stop being the same person? The materialist simply has to admit that we are our bodies (for what else could we be?). But given that fact, to which part are we identical? The brain? If so, at one point in the experiment do we cease to exist? 51% of our brain is gone? 70%? All but one neuron? So is our identity grounded in that one neuron? If so, which one? Or is it just grounded in having any one neuron as the same? If so, how?

Problem 2: materialism cannot make sense of the bodily resurrection:

He writes:

Central to the Christian hope is the hope for a future resurrection. The question which must be asked is this: Is this hope grounded in reality?

Suppose materialism were true. If that is the case, then humans are identical with their bodies in some fashion. I am intentionally vague here because I admit I’m not convinced as to how identity works within a Christian view of materialism (see above). If this were the case, then when we die and our material body decomposes, it may go on to become all sorts of different things, which themselves later pass away (plants may grow from the nutrients broken down from the body; then those plants may be harvested and eaten by other humans/animals/etc, which then die and are broken down, etc.). In the resurrection, then, God creates our body anew, complete–I assume–with our memories, experiences, etc. built in (perhaps they are simply functions of our brain, which God recreated perfectly, which thus contains our experiences).

Is there actual hope on this scenario?

Suppose the mad scientist were to come and kidnap you. He gleefully announces that he is going to use you for excruciatingly painful experiments which will take place over several years until you die. But, do not worry, because once you die, he is going to create a new body which is an exactly perfect copy of you, which will of course have all your experiences (minus this torturous one) and memories in place, and then he is going to give you billions of dollars.* Would you be comforted by this scenario? After all, you’re not going to remember the pain and you are going to come out the other end extremely rich!

Well there is a problem: the new body is not you. It is just a copy. For any materialist, this is problematic. We seem to know that identity transcends the body. But let us not delve into that difficulty right now. Instead, we will focus on Christian materialism. Now, it seems to me that this problem is almost the same for the Christian materialist with the Resurrection. After all, we are going to die. But we are told, don’t worry, we will be raised bodily by God! But whose body is going to be raised? How will God gather the material from our body (and at which time of our body–see above) in order to recreate us? And will not this body purely be a copy, rather than actually us?

There is a real disconnect here. Christian materialism cannot offer us the hope of the resurrection, without which our faith is worthless (1 Corinthians 15). Instead, it offers us the hope for our future copies, which will themselves have our memories and experiences, but will not be us. Our bodies will die and distribute throughout various portions of the world (even the universe–who knows if an asteroid might hit and distribute the molecules which made up our body elsewhere?). Then God will create us again in some fashion, and that body will live on in the Kingdom. But that body is not us. It will be a new body. This isn’t begging the question, it is merely stating a fact. The body that will be raised is not the body I have now. Thus, if I am my body, I am not raised.

And I would add to that additional problems with generic materialism, like first-person consciousness, freedom of the will, rationality, and so on. It’s just not a sound view.

I remember attending a philosophy of religion conference at Wheaton College a long time back, where the main speaker was Christian materialist Peter Van Inwagen. Both of these objections were raised against him, and neither objection was adequately responded to, in my opinion. In contrast, the orthodox view (body and soul dualism) holds up very well. The biggest problem with the dualist view (my view) is how do the body and soul/mind interact. But I think that problem is much smaller than the problems that J.W. raised above.

Podcasts

Brian Auten interviews Dr. Angus Menuge on philosophy of mind

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Click here for the interview. It’s up at Apologetics 315!

Details:

Today’s interview is with Dr. Angus Menuge, Professor of Philosophy  at Concordia University, and author of Agents Under Fire: Materialism and the Rationality of Science. He talks about his background and work, the philosophy of mind, what reason (or reasoning) is, what materialism is as a worldview, things excluded from a materialistic worldview, methodological naturalism and materialism, accounting for free will, materialistic accounts of reason, the epistemological argument from reason, the ontological argument from reason, finding the best explanation for reason, problems with methodological naturalism, implications of materialism, practical application of the argument from reason, advice for apologists, the International Academy of Apologetics, and more.

If what Dr. Menuge says in this interview is true, and I think it is, then a person who believes in materialism can neither ground free will nor rationality! So atheism wouldn’t really be freethought so much as it would be… un-free… non-thought.

In case people don’t want to listen to the podcast, then I’ve got some things for you to read below.

The ontological argument from reason

Dr. Menuge presented a paper at the real Evangelical Philosophical Society conference for students and professors of philosophy, and you can download the paper here in Word format. (here’s a PDF version I made)

Here is the introduction to the paper that Dr. Menuge read at the EPS conference:

The argument from reason is really a family of arguments to show that reasoning is incompatible with naturalism. Here, naturalism is understood as the idea that foundationally, there are only physical objects, properties and relations, and anything else reduces to, supervenes on, or emerges from that. For our purposes, one of the most important claims of naturalism is that all causation is passive, automatic, event causation (an earthquake automatically causes a tidal wave; the tidal wave responds passively): there are no agent causes, where something does not happen automatically but only because the agent exerts his active power by choosing to do it. The most famous version of the argument from reason is epistemological: if naturalism were true, we could not be justified in believing it. Today, I want to focus on the ontological argument from reason, which asserts that there cannot be reasoning in a naturalistic world, because reasoning requires libertarian free will, and this in turn requires a unified, enduring self with active power.

The two most promising ways out of this argument are: (1) Compatibilism—even in a deterministic, naturalistic world, humans are capable of free acts of reason if their minds are responsive to rational causes; (2) Libertarian Naturalism—a self with libertarian free will emerges from the brain. I argue that neither of these moves works, and so, unless someone has a better idea, the ontological argument from reason stands.

The paper is 11 pages long, and it is helpful for those of you looking for some good discussion of one of the issues in the area of philosophy of mind.

You may also be interested in Alvin Plantinga’s epistemological argument from reason, which is related to this argument. It shows that even to have the ability to think, you have to have a certain anthropology and you have to have mental faculties that are designed for reason, not survival.

Methodological naturalism

Dr. Menuge also wrote an article entitled “Is methodological materialism good for science?”.

Intro:

Should science by governed by methodological materialism? That is, should scientists assume that only undirected causes can figure in their theories and explanations? If the answer to these questions is yes, then there can be no such thing as teleological science or intelligent design. But is methodological materialism a defensible approach to science, or might it prevent scientists from discovering important truths about the natural world? In my contribution to The Waning of Materialism (Oxford University Press, 2010), edited by Robert Koons and George Bealer, I consider twelve of the most common arguments in favor of methodological materialism and show that none of them is convincing.

Of these arguments, perhaps the most prevalent is the “God of the gaps” charge, according to which invoking something other than a material cause is an argument from ignorance which, like a bad script writer, cites a deus ex machina to save our account from difficulty. Not only materialists, but also many Christian thinkers, like Francis Collins, worry that appeal to intelligent design commits the God of the gaps fallacy.

As I argue, however, not only is an inference to an intelligent cause not the same as an inference to the supernatural, it is a mistake to assume that all gap arguments are bad, or that only theists make them. If a gap argument is based solely on ignorance of what might explain some phenomenon, then indeed it is a bad argument. But there are many good gap arguments which are made both by scientific materialists and proponents of intelligent design.

So how do you make an argument like that?

As Stephen Meyer has argued in his Signature in the Cell, intelligent design argues in just the same way, claiming not merely that the material categories of chance and necessity (singly or in combination) are unable to explain the complex specified information in DNA, but also that in our experience, intelligent agents are the only known causes of such information. The argument is based on what we know about causal powers, not on what we do not know about them.

Since the inference is based on known causal powers, we learn that the cause is intelligent, but only further assumptions or data can tell us whether that intelligence is immanent in nature or supernatural. It is a serious mistake to confuse intelligent design with theistic science, and the argument that since some proponents of design believe that the designer is God, that is what they are claiming can be inferred from the data, is a sophomoric intensional fallacy.

If you think this is interesting, then do have a listen to the podcast. Dr. Menuge is not an ordinary academic – he is very direct. He calls materialism “a catastrophe” in the podcast! Not a shrinking violet.