托福阅读素材之埃及罗塞塔石碑（二）

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　　3:38

　　Deciphering the script is not just an intellectual puzzle; it's actually become a question that's become deeply intertwined with the politics and the cultural history of South Asia. In fact, the script has become a battleground of sorts between three different groups of people. First, there's a group of people who are very passionate in their belief that the Indus script does not represent a language at all. These people believe that the symbols are very similar to the kind of symbols you find on traffic signs or the emblems you find on shields. There's a second group of people who believe that the Indus script represents an Indo-European language. If you look at a map of India today, you'll see that most of the languages spoken in North India belong to the Indo-European language family. So some people believe that the Indus script represents an ancient Indo-European language such as Sanskrit.

　　4:28

　　There's a last group of people who believe that the Indus people were the ancestors of people living in South India today. These people believe that the Indus script represents an ancient form of the Dravidian language family, which is the language family spoken in much of South India today. And the proponents of this theory point to that small pocket of Dravidian-speaking people in the North, actually near Afghanistan, and they say that perhaps, sometime in the past, Dravidian languages were spoken all over India and that this suggests that the Indus civilization is perhaps also Dravidian.

　　5:03

　　Which of these hypotheses can be true? We don't know, but perhaps if you deciphered the script, you would be able to answer this question. But deciphering the script is a very challenging task. First, there's no Rosetta Stone. I don't mean the software; I mean an ancient artifact that contains in the same text both a known text and an unknown text. We don't have such an artifact for the Indus script.And furthermore, we don't even know what language they spoke. And to make matters even worse,most of the text that we have are extremely short. So as I showed you, they're usually found on these seals that are very, very tiny.

　　5:37

　　And so given these formidable obstacles, one might wonder and worry whether one will ever be able to decipher the Indus script. In the rest of my talk, I'd like to tell you about how I learned to stop worryingand love the challenge posed by the Indus script. I've always been fascinated by the Indus script ever since I read about it in a middle school textbook. And why was I fascinated? Well it's the last major undeciphered script in the ancient world. My career path led me to become a computational neuroscientist, so in my day job, I create computer models of the brain to try to understand how the brain makes predictions, how the brain makes decisions, how the brain learns and so on.

　　6:15

　　But in 2007, my path crossed again with the Indus script. That's when I was in India, and I had the wonderful opportunity to meet with some Indian scientists who were using computer models to try to analyze the script. And so it was then that I realized there was an opportunity for me to collaborate with these scientists, and so I jumped at that opportunity. And I'd like to describe some of the results that we have found. Or better yet, let's all collectively decipher. Are you ready?

　　6:41

　　The first thing that you need to do when you have an undeciphered script is try to figure out the direction of writing. Here are two texts that contain some symbols on them. Can you tell me if the direction of writing is right to left or left to right? I'll give you a couple of seconds. Okay. Right to left, how many? Okay. Okay. Left to right? Oh, it's almost 50/50. Okay. The answer is: if you look at the left-hand side of the two texts, you'll notice that there's a cramping of signs, and it seems like 4,000 years ago, when the scribe was writing from right to left, they ran out of space. And so they had to cram the sign. One of the signs is also below the text on the top. This suggests the direction of writing was probably from right to left, and so that's one of the first things we know, that directionality is a very key aspect of linguistic scripts. And the Indus script now has this particular property.