I just had to respond because I am a somewhat new developer and after a while I could also tell you what a class was, an instance, static methods, public methods, private methods, etc. But i'd be darned if I could look at somebody else's class for doing something and be able to tell you why there was a static method over here, a private method over there, and a public method somewhere else. I guess my point is that somebody could abstractly tell you what those different definitions are, but that is much different than actually being able to write a class correctly. (at least in my experience.)