I promised to write more about choice and chance. And now I think I have found the piece of the puzzle that I was looking for - rules. Choice, chance and rules. Let me try to summarize the thoughts behind this rather abstract formula (I write here about creating music but perhaps this could be applied to all creative processes): When you create music, more or less consciously, you make choices you follow certain rules and you leave certain elements to chance. I am currently involved in a project about computer music. I think this phenomena can be a clarifying example, because it makes all processes more clear (at least for the person making the programming). You can use the computer to carefully choose every little detail, you can use the computer to make same parameters random (Aleatoric music) or you can use the computer to govern the music by rules (Algorithmic composition).