Game design is all about understanding human psychology and specifically most of it is about some very unstudied aspects of human psychology. Most of game design is about designing for the pleasure of the human mind. And psychologists normally don't care about that very much. Psychologists are very often - they're very focused on preventing suffering of the human mind and predicting behavior of the human mind, which are very different activities than optimizing for the pleasure of the human mind. And so the irony here is the psychologists can't help us very much. They have some things they bring to the table that are definitely very helpful but in general there's huge areas that they just don't, don't comprehend and don't have much to bring. And you can tell this. I've been to their parties right. And it stands to reason that psychologists should have the best parties on planet earth because they know the most about the human mind. But no, their parties are terrible. So, we have to, in terms of understanding pleasure of the human mind we have to be brave and we have to just try and find it and figure it out ourselves. And there's so many things that game designers have learned about the way the mind works. I don't know if they're known and understood by the world at large. And we're still learning more all the time. Any time someone makes a new game and people are surprised at, "Really people like that game?" That means that was something about the human mind that wasn't understood and maybe still isn't understood yet.