The Problem with Analytics - I, Cringely

There is a difference between knowledge and understanding. Knowledge typically comes down to knowing facts while understanding is the application of knowledge to the mastery of systems. You can know a lot while understanding very little. Just as an example, IBM's Watson artificial intelligence system that defeated the TV Jeopardy champs a few years ago knew all there was to know about Jeopardy questions but didn't really understand anything. Ask Watson to apply to removing your appendix its knowledge of hundreds of medical questions and you'd be disappointed and probably dead.