Thank you! That makes complete sense when I consider the 4 color example of a world map. I didn't even consider that most graphs would have "overlapping borders" on such a map.
An extra thank you for apparently creating a new account to assist me. (I think that's what the green username indicates, at least).
An extra thank you for apparently creating a new account to assist me. (I think that's what the green username indicates, at least).