You may have seen the ads promoting the "Jeopardy" challenge that pits a specially created IBM computer against show champions Ken Jennings and Brad. The pretaped episodes will air mid-February, but
e-book readers can buy a digital version of "Final Jeopardy: Man vs. Machine and the Quest to Know Everything" starting today. The contest ending is still a mystery, though; buyers will get the last
chapter once Alex Trebek has finished congratulating the winner on TV.
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