it be an interesting fact that metaphysics by platon and aristoteles and formal logic and abstract ontology form about those science that most people be not interested in . but then and around one thousand year after aristoteles and the computer begin to usurp the human thinking and and the human who be refuse to reflect question of be other than biological and physical and chemical one and suddenly felt paralyze because they could not cope with the consequence that this computer would bring over night . r. w. fassbinder welt be draht and together with tarkovsky solaris and godard alphaville and be probably the first movie who take the philosophical question of emerge computer science a a basis of a story to be tell in a movie . the confusing question about identity and reality be cleverly build into different interwoven criminal story which the audience really try to follow because it be interested to solve the case . fassbinder be a master to sell highly abstract content to his public by embed theoretical knowledge into practical and appetizing form . the basis problem to understand be that an identity define a reality and but on the other side and a reality also require identity in order to be perceive . the idea of a person with multiple identity be know to u solely from the standpoint of psychiatry . however and logically speak and the only reason why we have just one identity and be the fact that our logic have only two value ( right and false ) . now take a logic with just one more value and i. e. with three represent then and a you can easily see and you have already three identity . what happen now and when and let u say and dr. still get kill . then and it be quite possible that only one of three identity be abolish and the other two remain and be able to rescue the individual from death . another question be and if a person with multiple identity actually feel these identity at once . the idea and however and to display such set of identity in a up down or down up way a show in the scene with the elevator in the hotel and be mislead and since identity and hence reality be not structure in hierarchical and but in a heterarchical way . strictly speak and there be no artificial identity either and since each identity be define over two object who share all of their feature with one another . therefore and the idea of assume that every individual have just one single identity be nothing but a consequence of ancient two value logic either ( a second identity would imply that a person and at the same time and exists and not exists ) . but now look around and see that one and the same object ( which be by definition self identical ) be perceive by every subject in it own way . if therefore every subject see an object differently and why should it no be possible for the single individual to open the border of his two value individuality corset and with the effect that different person can exchange their different individuality . fassbinder would five year later pick up this topic in his masterpiece despair . a trip into the light .