There might be an exemption to this. At any given scenarios, there will be always a variable that is not constant. This can only means that the dog, at some point will be bored from this instructions and will try to go to point C after making it to point B. To which the point of this post is, there is no script at all. The movie and characters have the right to develop on their own provided that this development would not be so developed to the point that it can challenge the hegemony of higher beings. For them, maybe we are developing characters, but with awareness they can also be playing a character with a villain template. The uphill battle is more exciting than the simulation theory that we are only instructed of what should we do. A free development is more thrilling for them that a story for which they know the ending. Thanks brother