Inspecting the horse's teeth for plaque and decay

New rule: if you ask someone for directions, you are not allowed to argue over the directions you receive.

Also: it is a fundamental axiom of geometry that two parallel lines will never cross, so you shouldn't be so shocked that Rochester Road never intersects with Livernois Road.

(Thankfully, I restrained myself from whipping out my iPhone, and from telling the schmuck that "since you are obviously so familiar with the area, talking to me is just slowing you down.")