Today Son #1 saw the dog out in the yard. He used that time-honored dog-fooling trick to get him back inside--he waved the leash and offered him a walk. Completely unaware that he's already outside, the dog always runs for the leash. We are superior. Our dog is clearly an idiot.
Then, the dog got out again. A second time, the leash trick got him back in the house.
And again, he appeared in the yard. He was successfullly leashed a third time. At this point, we finally thought to check the garage door. Which was, in fact, open.