There are things that humans do well that computers do poorly. Harnessing all those 'human computing cycles' is an extraordinary challenge and opportunity.
I came across this talk by Luis von Ahn, a professor in the Computer Science Department at Carnegie Mellon a year ago and it was one of the most interesting and thought provoking I had seen in years.
Having enjoyed it so much, I was ecstatic to see recently that the the task of digitising the world's books is being helped by the reCaptcha programme.
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