Tuesday, January 27, 2009

Can machines think?


1.Is the Turing Test a sufficient test? That is, if a machine passes the test, would you agree it is intelligent?

To answer this question, we have to define “intelligence” first. There could be many different ways to describe this concept. According to Pinker (1999, p.62), intelligence “is the ability to attain goals in the face of obstacles by means of decisions based on rational rules”. If the explanation stops here, I would say a machine is intelligent if it passes the Turing Test. However, “consciousness” is further described as “a lofty synonym for intelligence” (p.134). We do not only think by rational rules, but also have a sense of self. When a machine passes the Turing Test, it does not “know” what it is doing or have sentient awareness.

2. Is the Turing Test a necessary test? That is, does a machine have to pass this test in order to be intelligent?

According to the above argument, it does not matter if a machine has to pass this test in order to be intelligent. Because the Turing Test itself can only test the ability to make decisions based on rational rules, but we cannot tell its consciousness and sentience through this test.

3. Will a machine ever pass the Turing Test? Why or why not?

As I know, there is no artificial intelligence ( AI ) can win the Loebner Prize (the first formal instantiation of a Turing Test.) so far. Is it possible that a machine’s response can be indistinguishable from a human's in the future? I tend to have a skeptical answer to this question. Since the judge is a human being, he/she does not only make judgment by rules, but consider all aspects of human being—emotion, desire, feelings, etc. People may be able to distinguish a machine from a human being. However, people are also easily deluded. Thus, it is not totally impossible that a machine can pass the Turing Test.

4. Will a machine ever be intelligent? Why or why not? (This may or may not be the same answer to the previous question).

Unless the human being’s consciousness, sentience, emotion, and so on can be programmed into a machine, I do not think a machine can ever be intelligent. I think there are too many components to be considered as intelligence, especially human intelligence. Even though a machine can store a lot of information, can assess data fast, or even win a chess match (Can machines think?), can it know what it is doing and why it is doing it?

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