On this date 83 years ago — Sept. 12, 1940 — three French teenagers took a walk in the woods, near their home in southwestern France. It’s possible the boys had a dog with them, and it’s possible the dog was named Robot. It’s even possible that Robot, their dog, fell into a hole. It’s hard to tell what’s true about the dog because that day, Sept. 12, 1940, was special. It was so special that the boys were asked to recount what happened to them dozens of times, and — over time — the story grew into legend, as it sometimes does when teenagers are asked to talk about an important thing…