“Y’know” one of the men sitting around the table began, “it’s the strangest thing. There is this dog showing up every evening, and I’ve taken to giving it some pats and something to eat. Don’t know where it comes from or where it goes, but it always comes back”

“Hold on” one of the others said, “I have one too”

“Me too” the two others said, albeit not in unison

“Could it be” the first man pondered, “that it’s the same dog all around?”

After a short burst of comparison, they concluded that it indeed was so. The mystery of origin and destination remained, however