No, he's very knowledgeable. It's just that not everyone has the time or inclination to respond to very basic questions that you could look up yourself. I suggest you bookmark that Wikipedia website.
Please don't Wikipedia is not a reliable source of information. Anyone can write anything they want at any time. Someone else can correct it with anything else they want at any time, and so forth ad infinitum. The assumption is that eventually accurate information will appear. The problem is, no one knows when "eventually" has happened.
You're better served getting a subscription to the Encyclopedia Britannica online.