Google's Peter Norvig, the search giant's director of research, knows just how complex semantic algorithms can be: His Berkeley Ph.

FORBES: Magazine Article

Peter Norvig is haunted by the prospect of what it misses.

FORBES: The Machinist

Frustrated that his (and fellow Googler Peter Norvig's) Stanford artificial intelligence class only reached 200 students, they put up a website offering an online version.

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