Over a period of years, Watson was fed mountains of information, including text from commercial sources, such as the It can hold the equivalent of about one million books worth of information. Watson runs on a cluster of Power 750™ computers-ten racks holding 90 servers, for a total of 2880 processor cores running DeepQA software and storage. Jeopardy! clue, “Colorful fourteenth century plague that became a hit play by Arthur Miller.” The only way to get to that answer is to put together pieces of information from various sources, because the exact answer is not likely to be written anywhere. “What is The Black Death of a Salesman?” is the correct response to the
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The questions on this show are full of subtlety, puns and wordplay-the sorts of things that delight humans but choke computers. That wasn’t good enough to be useful, much less beat University researchers and company engineers have long worked on question answering software, but the very best could only comprehend and answer simple, straightforward questions (How many Oscars did Elizabeth Taylor win?) and would typically still get them wrong nearly one third of the time. Search engines don’t answer a question–they deliver thousands of search results that match keywords. “The goal is to build a computer that can be more effective in understanding and interacting in natural language, but not necessarily the same way humans do it.”Ĭomputers have never been good at finding answers.
“The goal is not to model the human brain,” said David Ferrucci, who spent 15 years working at IBM Research on natural language problems and finding answers amid unstructured information. IBM’s scientists have been quick to say that Watson does not actually think. Watson does a remarkable job of understanding a tricky question and finding the best answer.
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