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IBM's "Watson" computer beats human players in Jeopardy

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After years of planning, IBM’s learning, human-aware computer Watson was put to a competition like no other – a match of Jeopardy against quiz show heavyweights Ken Jennings and Brad Rutter. The result – Watson won. Barely.

The match, which Watson has been training for since 2009, was officially announced last year.  At the end of last week, the multi-episode feature where Watson faces off against Jennings and Rutter was filmed.

But right before that, all three competed in a trial run at IBM’s headquarters in New York State. The trial lasted as long as a normal game of Jeopardy would before its first commercial break – in other words, about enough time for the contestants to get through half of a round.

Right before the last clue of the round, Jennings and Watson were tied at $3,400. However, Watson chimed in to answer the final question and correctly identified the children’s book Harold and the Purple Crayon. That set him ahead to $4,400. Rutter trailed at $1,200.

The full-length Jeopardy matches have been filmed, but no one is allowed to discuss the results. They’ll be aired on TV next month, and at that time we’ll really know who wins in the battle of man versus machine.

AT&T Preps for Heightened Verizon iPhone Competition

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By SHARA TIBKEN

NEW YORK—AT&T Inc. cut its price for Apple Inc.’s iPhone 3GS to $49 from $99 as the carrier prepares for heightened competition from a Verizon Wireless iPhone launch expected early this year.

AT&T, which currently is the exclusive network operator for the iPhone in the U.S., said the iPhone 3GS will be available at the lower price starting Friday. The iPhone 4, released in June, sells for $299.

The move comes as AT&T faces increasing pressure from customers and critics alike, who have complained about the reliability of the company’s wireless data and voice network. Additional competitive pressure is expected from new smartphones showcased at the Consumer Electronics Show in Las Vegas this week, and from Verizon Wireless once it starts selling the iPhone, potentially as early as the first quarter.

AT&T added a record number of iPhone subscribers in the third quarter but paid a heavy price to do so. While the activations require AT&T to pay Apple high subsidies that cut into its near-term profit, they also lock in new and existing customers to a two-year contract. AT&T is banking on those contracts to blunt any potential defections if the carrier loses its iPhone exclusivity.

The latest offer from AT&T is available to both new and certain existing customers and requires a two-year wireless-service contract of at least $39.99 a month, plus $15 data plan.

AT&T isn’t the first company to discount the iPhone, with retailers such as Wal-Mart Stores Inc. and Radio Shack Corp. offering promotions.

—Tess Stynes contributed to this article.