| A problem remains: if islands are considered, so as to include the pair New York / Rhode Island, also Michigan / Minnesota should be added, because Isle Royale (in Lake Superior) belongs to Michigan and is at only 22.7 km (14.1 miles) from the coast of Minnesota. (Blame Google Earth, not me, for all these tiresome comments). An alternative could be to declare in the introduction that only points on mainland are to be considered. |