Entrepreneurs See a Web Guided by Common Sense

There is a story is the New York Times titled, Entrepreneurs See a Web Guided by Common Sense. The article starts with this:
From the billions of documents that form the World Wide Web and the links that weave them together, computer scientists and a growing collection of start-up companies are finding new ways to mine human intelligence.

Their goal is to add a layer of meaning on top of the existing Web that would make it less of a catalog and more of a guide — and even provide the foundation for systems that can reason in a human fashion. That level of artificial intelligence, with machines doing the thinking instead of simply following commands, has eluded researchers for more than half a century. Article continued here.