"working knowledge"

Today's employer is looking for a well-rounded individual with a diverse skillset that includes a "working knowledge"(which appears to be the 'cname' for "I know of it, and if you give me a book and 3 days to read it, I can convince people who don't know much about it that I'm an expert") of the trends, but also a more traditional background. (ie: systems administrators should know some form of Unix, and be able to fake their way through Windows... Programmers should know C, C++ or another "commonly accepted industrial-strength" programming language... On TOP of that they can know the latest buzzword OS to hit the market, and whatever odd new language has been thrown into the fray.