In other words, we need to develop processes that make this kind of communication systemic. Solutions include regularly scheduled communication meetings with question periods, and effective orientation programs. Although I've had no direct experience with them, I've heard good things about orientation programs that make new employees go out and interview people around the organization. This involves a decision not to communicate because of an assumption that everyone else knows what I know. It's especially a problem for implicit knowledge, which falls outside established systems for communication.
Application Look for ways to ensure that information and knowledge get communicated systematically.
And, while it may be tempting to look at personalities when the 'everybody knows' syndrome strikes, you'll only get good solutions by looking at structure and systems. Your comments about this article would be welcomed. No doubt you get quite a few newsletters, as I do. But, if asked what newsletters you receive, and when, you'd probably be hard pressed to provide details. This growth in popularity occurred because two important trends converged.