(D**ned) Urbanites. Or if the rural area happens to be hilly, flatlander.

Personally, not to me. I am sure means I know from what I have done. And it is that I know it all, it is my experience. “I feel sure” means that I’m guessing/have an opinion that I think is right, but then in life have no direct observation. If a coffee tray is empty, I can’t tell if it is empty or if it is torched. I feel sure that there’s more in the pot, because there usually is, but some inconsiderate person might have taken the last cup without starting a new pot.