Video showing how when we add data and metadata to the Internet it effectively learns. Hard to boil down to a soundbite. Well worth a watch or two. Don't worry if you don't understand it all. It'll come in time.

Classic video where Jon Udell looks at the evolution of a relatively obscure Wikipedia article and in doing so uncovers how the Wikipedia community collectively writes, edits and manages the site. It's about 7 minutes long.