On one axis is the difference between whole games or whole artifacts and partial ones. Or parts on the other axis they distinguish play from games and this is a distinction that I'll explain in more detail in a later segment but for now think about games as things involving rules and structures and winning and loosing. Whereas play is pure exuberant fun, pure release of exuberant energy in that kind of context. So what they do in this article is they distinguish along those axes four different quadrants. So the quadrant here involving. Play in whole artifacts they say well that's toys when you play with something and it's a thing that's called a toy and if you play but were not making it an entire thing they say well that's called playful design it's about designing. Using the notion of play making things feel a little bit more playful a little bit more fun but not systematically structuring them with rules and goals and so forth. On the top left quadrant is something is a game and it's a whole artifact well that's. Games, but specifically, for our purposes, that's where we would put serious games. Because again, serious games are full blown games to address non game uses. And that distinguishes them from gamification. Which of course, goes here, in the top right quadrant. Gamification being using parts of games to address non-business excuse me, non-game challenges. It fits in this quadrant, right here.