Many persons work on a film, a person is not restricted to one role and one could be both the director and a character in a film but this is not possible in the Inheritance Role Model.
Many persons work on a film, each of them with a different role. At the difference of other concepts, a person is not restricted to one role. One could be both the director and a character in a film. the Inheritance Role Model - is not possible, as this would allow a person to play only a single role. 
