In this Shutter Island film, Andrew Laeddis has bad experienced from his life, then how he did the recollection from of past that brought him into the realm of consciousness or sanity. In this case, the subconscious and pre conscious mind are masters that he often experience delusions and hallucinations. So it is difficult to distinguish what is real and not. Indirectly, it has established a defense mechanism itself.One of the most lasting contributions Freud made to the area of psychopathology was his ingenious explaination of the defense mechanism which we all unconsciously use to defend or protect the ego. From anxiety created by unacceptable material. There are several defense mechanisms according to Freud theory in turn.