"there’s an educational trivia game at the citadel on the exhibits on different planets called “Dog or Not?” that shows pictures of various four legged mammals and asks if they’re a breed of dog.
it was mainly for kids to learn about the diversity of earth’s flora and fauna but it became popular with adult aliens too and had to be shut down after almost causing no less than three diplomatic incidents.
they brought it to the nexus and it’s caused two more so far" (more at the link) -- CallMeGallifreya
Some called the game Dog or Not Dog? because many species are literal-minded and don't understand an open negation. Those who did, left the terminal noun unsaid. And it was the single most infuriating game known to the Galactic Alliance.
Dogs, along with ductape, were Humanity's Advance Ambassador. Going to places where humans were not allowed. A trained predator that could be tasked with anything. They even had breeds that could keep their still-fragile young from harm. There were ones big enough to be steeds and, confusingly, steeds small enough to be dogs. And many other fur-bearing mammals that could be confused for dogs.
It was the game that everyone loved to be frustrated at.