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Watson will test its understanding by playing Jeopardy against Ken Jennings. Ken is the all time champ in Jeopardy history. Sure any program to do a Google to try to answer Jeopardy questions. However that will not help the computer beat a smart human like Jennings.
The Watson system will use some smarts to process the language from the host. Then it will analyze a database to determine the best answer. Get this. It will respond in a robot voice. I was expecting some weird metal robot from the 70's. However Watson is just a program running on a special IBM computer. To tell the truth, I am not sure I will be cheering for the computer. I like Ken Jennings.