I would say "the town is 15 miles further"
Wikipedia can be edited by anyone so it’s unreliable. It’s not scholarly or even protected by anyone to keep false info out
Logos is an appeal to logic and is a way of persuading by reason. Concession is useful because sometimes to win you need all the assets in the room, and one of the best resources comes straight from the others mouth. It allows room for your opponents ideas and audiences beliefs. You're bridging truths to get to your point.