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The history of artificial intelligence.  Host Dave Robertson first welcomes Luke Dormehl, tech journalist and author of "Thinking Machines: The Quest for Artificial Intelligence - And Where It's Taking Us Next."  Hear how AI began and what advanced technology's historical past can teach us about the future. Plus, Dollar Tree Co-Founder Macon Brock talks to Dave about his book "One Buck at a Time."  Hear how this business is able to maintain its founding principle and stick with a one-dollar price point.