As a Chinese, I really like the Confucius' saying in the end.
Sent to you by Feng via Google Reader:
On and off through my career, I've encountered people—usually students, occasionally faculty members—who didn't know what they were talking about. Of course that was just how it seemed to me at the time, and I may have been wrong. However, I think I'm able to work out whether someone talking the talk has also walked the walk, at least in the areas with which I am moderately familiar. As with Lieutenant Columbo, a few "dumb" questions are usually enough.