When my wife and I travel by car, she drives and I navigate. This makes sense for two reasons. She gets car sick quickly if she reads the map. And it's harder for her to criticize my driving when she is driving.
One thing I believe I have discovered reading Michelin maps is that no two cities in France have exactly the same name. This is in contrast to the U.S. (e.g., Arlington, VA; Arlington, MA; Arlington, TX). Of course, similar names do occur in France, but there is always some official distinction (e.g., St. Germain-des-Pres and Saint Germain-en-Laye).
The chances of this happening on its own are infinitesimal. Some "city name czar" must make sure things work out this way.
Can anyone confirm this conjecture?