Gradual development and constant revision

But Adler’s statement suggests that creativity is some kind of specialty like piano tuning or knee surgery, or that it is something one picks up in art school. But I doubt if having an art degree or even a successful career in the art world is any guarantee of spontaneous "creativity" or the ability to impart it. Moreover, psychological studies of creativity have shown that the popular picture of the artist constantly making "creative leaps" does not match the actual procedures of most professional artists, including some famous names such as Alexander Calder or Picasso. Gradual development and constant revision are more likely than occasional moments of sudden inspiration.[29] In fact, as Philip Alperson has remarked, there is a "vast spectrum of ways in which artists work," a spectrum, I would add, that largely overlaps the approaches of makers and discoverers in many other fields.[30]

Larry Shiner

How do you exercise judgement in a discipline that has no rules?

How do you exercise judgement in a discipline that has no rules?
Or, how do you play a game without rules?
Or, how do you play a game in which the rules are constantly changing?
The unstable nature of the rules becomes the game.
The rules require adaptability and flexibility in a changing environment.
Think of fashion, or the stock market. or evolution.
Are there other areas?